关闭图标
log图标

toefl.viplgw.cn

  • 使用手机注册
  • 使用邮箱注册
  • 手机号不能为空!

    验证码不能为空!

    用户名不能为空!

    密码不能为空!

  • 邮箱不能为空!

    验证码不能为空!

    用户名不能为空!

    密码不能为空!

已有账号? 登录到雷哥托福
关闭图标
log图标
  • 使用手机找回密码
  • 使用邮箱找回密码
  • 手机号不能为空!

    验证码不能为空!

    密码不能为空!

  • 邮箱不能为空!

    验证码不能为空!

    密码不能为空!

又想起来了
加入生词本

listen

英['lɪs(ə)n] 美['lɪsn]
vi. 听,倾听;听从,听信
n. 听,倾听

已添加
×

我要举报草莓小菇凉评论

用户头像
草莓小菇凉:说的非常好,十分有道理,棒棒棒!

06-08 15:44:55

请选择举报类型:

举报电话:400 1816 180    举报QQ:2095453331
×
logo图标
分享到雷哥托福

分享成功图标分享成功

邀请名师点评成功,管理员正在安排老师进行点评。

继续做题 返回首页
支付雷豆失败图标 雷豆余额不足 购买雷豆 返回
报告题目错误
请选择错误类型:
请描述一下这个错误:

取消

文章结构

Official 11-L3 .Landscape & Climate 点击收藏

标准

  • 高音
  • 静音
  • 句子
    精听
  • 全文
    精听
  • 听写
    模式
  • 点击查看本句

    听写本句 再播一遍 下一句
  • 点击查看全文

    再播一遍本文

    Listen to part of a lecture in an environmental science class.

    When land gets developed for human use, the landscape changes.

    We don't see as many types of vegetation, trees, grasses and so forth.

    This in turn leads to other losses: the loss of animal that once lived there.

    Err... but these are the obvious changes, but there are also less obvious changes like the climate.

    One interesting case of this... of changes in the local land use causing changes in climate, specifically the temperature is in Florida.

    Now what comes to mind when you think of the state of Florida?

    Sunshine, beaches.

    Warm weather, oranges...

    Yes, exactly.

    Florida has long had a great citrus industry - large growth of oranges, lemons and the like.

    Florida's winter is very mild; the temperature doesn't often get below freezing.

    But there are some areas of Florida do freeze.

    So in the early 1900s, farmers moved even further south in Florida, to areas that were even less likely to freeze.

    Obviously, freezing temperatures are a danger to the crops.

    A bad bout of cold weather, a long spell of frosts could ruin a farmer's entire crop.

    Anyway, before these citric growers moved south, much of the land in south Florida, was what we called wetlands.

    Wetlands are areas of marshy, swampy land, areas where water covers the soil, or is present either at or near the surface of the soil for a large part of the year.

    Wetlands have their own unique ecosystems, with plants and animals with special and interesting adaptations.

    Very exciting, but it's not what we are talking about today.

    Emm... where was I?

    Farmers moved south?

    Oh, yes. Farmers moved south. But the land was not suitable for farming.

    You can't grow oranges in wetland, so farmers had to transform the wetlands into lands suitable for farming.

    To do that, you have to drain the water from the land, move the water elsewhere, and divert the water sources such as rivers.

    Hundreds of miles of drainage canals were built in the wetlands.

    Now these areas, the new areas the farmers moved to, used to be warm and unlikely to freeze, however, recently the area has become susceptible to freezes.

    And we are trying to understand why.

    Is it some global temperature change or weather pattern like El NiNO or something?

    Well, there are two theories.

    One idea is as you suggested that major weather patterns, something like El NiNO, are responsible.

    But the other idea and this is the one that I personally subscribe to, is that the changes in the temperature pattern had been brought about by the loss of wetlands.

    Well, how would the loss of wetlands make a difference?

    Well, think about what we've been studying so far.

    We discussed the impact of landscapes on temperature, right?

    What affects does the body of water have on an area?

    Oh, yeah. Bodies of water tend to absorb the heat during the day, and then they release the heat at night.

    Yes, exactly.

    What you just said is what I want you all to understand.

    Bodies of water release heat and moisture back into the environment.

    So places near large bodies of water are generally milder, err... slightly warmer than those without water.

    And what I, another think is that the loss of the wetlands has created the situation where the local temperatures in the area are now slightly different, slightly colder than they were 100 years ago, before the wetlands were drained.

    Emm... do we know what the temperature was like back then?

    Well, we were able to estimate this.

    We have data about South Florida's current landscape, emm... the plant cover.

    And we were able to reconstruct data about its landscape prior to 1900.

    Then we enter those data, information about what the landscape look like before and after the wetlands were drained.

    We enter the data into a computer weather model.

    This model can predict temperatures.

    And when all the data were entered, an overall cooling trend was predicted by the model.

    How much colder does it get now?

    Well, actually the model shows a drop of only a few degrees Celsius.

    But this is enough to cause dramatic damage to crops.

    If temperatures overnight are already very close to the freezing point, then this drop of just a few degrees can take the temperature below freezing.

    And freezing causes frosts, which kill crops.

    These damaging frosts wouldn't happen if the wetlands were still in existence, just a tiny temperature difference can have major consequences.

    • special
    ☞查看答案 再播一遍

联系雷哥托福

全国免费咨询热线:400 1816 180

  • 上海(总部)
  • 北京
  • 成都
  • 杭州
  • 武汉
  • 南京
  • 广州
  • 西安
  • 重庆
  • 深圳
  • 上海(总部)服务中心

    电话:400 1816 180

    地址:上海市徐汇区文定路218号德必徐家汇WE艺术湾B座205

    公交路线:76路、93路、138路宜山路蒲汇塘路站;205路、732路、754路南丹路宜山路站;205路、754路、830路南丹路文定路站等

    地铁路线:地铁3号线、4号线宜山路站出站470m;地铁1号线、4号线上海体育馆站出站600m。

  • 北京服务中心

    电话:400 1816 180

    地址:北京市朝阳区雅宝路7号 E园EPARK大厦508

    公交路线:乘坐公交44路外环;58路;139路;特12路外环;特2路;夜20路外环到雅宝路公交站 下车,走140米即可达到。

    地铁路线:乘坐地铁1号线、2号线到建国门站(A出口)步行1000米即可到达;乘坐地铁2号线、6号线到朝阳门站(A出口)步行1200米即可到达雅宝路7号 E园EPARK大厦。

  • 成都服务中心

    电话:400 1816 180

    地址:成都市锦江区总府路31号Z31六楼(皇冠假日酒店旁)

    公交路线:乘坐58路、98路、锦城观光3号线、熊猫快线5号线在春熙路步行街北站下 步行约281米。

    地铁路线:乘坐地铁2号线或者3号线到春熙路C口下,步行约982米

  • 杭州服务中心

    电话:400 1816 180

    地址:杭州市江干区江锦路159号 平安金融中心B座8楼

    公交路线:901路、105路环线、106路环线、9M路:富春路民心路口站 176路:市民中心北大门站,市民中心西大门站

    地铁路线:号线钱江路站;4号线钱江路,江锦路

  • 武汉服务中心

    电话:400 1816 180

    地址:武汉市珞瑜路光谷世界城广场写字楼1栋1单元14层11421室

    公交路线:乘坐18路,25路,340路,510路,518路,521路等公交车到珞瑜路湖北省中医院站下车

    地铁路线:乘坐地铁2号线至珞雄路A口出,往湖北省中医院光谷院区方向步行50米至世界城广场写字楼

  • 南京服务中心

    电话:400 1816 180

    地址: 南京市秦淮区中山东路532号金蝶科技园 H1幢308号(林客社 内)

    公交路线:5路 34路 34路区间 36路 55路 59路 y5路夜间 17路 65路 115路 118路 y17路夜间

    地铁路线:地铁2号线明故宫站1号口出,向东200米

  • 广州服务中心

    电话:400 1816 180

    地址:广州市天河区体育西路103号维多利广场B座26楼K15

    公交路线:11,18,20,230,278,293,45,583,669,886冼村路中站下。 194,40,777,778,90,观光2路花城广场路站下。

    地铁路线:乘坐地铁APM线至花城大道站下B口出,步行约500米即可到达保利威座大厦北塔。

  • 西安服务中心

    电话:400 1816 180

    地址:西安市莲湖区北大街西华门十字西南角78号嘉会广场C座4层B021号

    公交路线:4路、12路、26路、36路、37路、229路、游7钟楼北站;15路、16路、32路、102路、182路、236路、286路西华门站。

    地铁路线:地铁二号线钟楼站150米;地铁一号线/二号线北大街站700米。

  • 重庆服务中心

    电话:400 1816 180

    地址:重庆市渝中区邹容路68号大都会广场16楼1603-1604室

    公交路线:401、135、114、111、401、151、862、181、262、105、866、153、466

    地铁路线:2号线临江门站500米、1号线小什字站500米、6号线小什字站500米。

  • 深圳服务中心

    电话:400 1816 180

    地址:深圳市罗湖区书城路都市名园B栋5楼B区(只接受预约拜访)

    公交路线:101路 10路 12路 203路 214路 215路 223路 29路 3路 85路 M112路 M191路 M192路 N3路 P100路(定制公交请预约) 高快巴士200号线 高快巴士20路 高快巴士863号线到地王大厦下,步行431米即可到达。

    地铁路线:乘坐1号线/罗宝线/2号线/蛇口线到大剧院(E口)出,步行498米即可到达都市名园B栋

预约托福考试规划师