英语翻译Green roofs are designed to save energy and capture rain

英语翻译
Green roofs are designed to save energy and
capture rainwater.Rooftops covered with plants help keep buildings cool.They
can extend the life of a roof.And they can reduce water runoff into streets and
storm water systems.
Several years ago,the mayor of Chicago,
Illinois,visited Germany,a leader in green roof design.Mayor Richard Daley
later decided to have vegetation
planted on Chicago City Hall.Today,the tops of many other buildings also look
like parks.
In Canada,the Coast Plaza Hotel in Vancouver
has a forest on its roof.
Experts say green roofs usually do not get much
above twenty-seven degrees Celsius.So temperatures might not be a problem for
growing.But rooftop gardeners have to be careful not to put too much weight on
the roof.This is true whether plants are grown in soil or water.
New York City has an unusual demonstration farm
for hydroponics.The farm is on a boat called the Science Barge.Rainwater and
purified river water are used to grow lettuce,tomatoes,cucumbers and peppers.
The farm shows the possibilities for designing rooftop systems.
Earlier this year,researchers in Texas reported
that green roofs can reduce a building's air conditioning costs by about
one-fifth compared to black-top roofs.But they also reported that not all green
roofs perform equally well.They found that designs differ in their ability to
keep buildings cool and to capture rainwater.
Mark Simmons led the study for the Lady Bird
Johnson Wildflower Center at the University of Texas at Austin."Green roofs
have to be done right," he says.For example,he says,"Just having a green roof
may not mean anything in terms of preventing water from reaching the street
level."
The team put experimental roofs on top of metal
insulated boxes,to recreate green roof conditions.The study compared products
from six companies.The researchers say they want to help businesses understand
how to improve their designs.
Each rooftop had sixteen different kinds of
plants native to Texas.The researchers say the presence of native plants likely
helped all the green roofs capture water better compared to sedums.Sedums are
plants that need little water and often are used on green roofs
急用

屋顶绿化设计,以节省能源和
收集雨水.屋顶覆盖着植物有助于保持建筑物凉爽.他们
可以延长屋顶的寿命.他们可以减少径流进入水街道和
雨水系统.
几年前,芝加哥市长,
伊利诺伊州,访问了德国,屋顶绿化设计的领导者.市长理查德·戴利
后来决定有植被
种植在芝加哥市政厅.如今,许多其他建筑物顶部也期待
像公园.
在加拿大,在温哥华海岸假日酒店
它的屋顶上有一个森林.
专家说,屋顶绿化通常并没有得到多少
高于27摄氏度.因此,温度可能不是一个问题
越来越大.但屋顶园丁必须要小心,不要把过多的重量
在屋顶上.这是真实的,不管植物是生长在土壤或水中.
纽约市有一个不寻常的示范农场
水培.该农场是一艘船名为科学驳船上.雨水和
纯化的河水被用来种植生菜,西红柿,黄瓜和辣椒.
农场显示屋顶系统设计的可能性.
今年早些时候,在得克萨斯州的研究人员报告
屋顶绿化可降低建筑物的空调成本约
五分之一相比,黑色顶的屋顶.但是,他们还报告说,并非所有环保
屋顶同样表现出色.他们发现,设计不同的能力
保持建筑物凉爽,以收集雨水.
领导这项研究的马克·西蒙斯夫人伯德
约翰逊在得克萨斯大学奥斯汀分校的野花中心.“屋顶绿化
右侧有许多工作要做,“他说,例如,他说,”只要有一个绿色屋顶
可能并不意味着什么,在防止水到达街道
水平“.
团队把实验屋顶金属上
绝缘箱,重建屋顶绿化条件.这项研究比较产品
从六家公司.研究人员说,他们要帮助企业了解
如何提高他们的设计.
每个屋顶有16种不同的
植物原产于得克萨斯州.研究人员说,原生植物的存在可能
帮助所有的绿色屋顶捕捉水更好地相比sedums的.Sedums
经常被用于屋顶绿化植物一样,需要少许水
再问： 看不懂，能整理一下吗