S09-03 Home《家园》

重点词汇：
1.Circular 圆形的，圆圈的，循环的
【同】round

2.Derive 取得，起源，衍生
【同】originate
Originate 起源于，首创

原音重现：
A:Fossil water also enables crops to be grown in the desert to provide food for local populations. The field's circular shape derives from the pipes that irrigate them around a central pivot. But there is a heavy price to pay. Fossil water is a nonrenewable resource.
原生态地层水令谷物得以在沙漠中生长，从而为当地人口提供粮食。圆形的农田由围绕中心的管道进行灌溉，但是代价是沉重的，原生地层水不可再生。