1. Ditches were dug to drain water from the swamp.
    挖渠排掉沼泽的水。

2. During the 1960s and 1970s, politicians in my native country, India, used to wave the slogan "Stop the Brain Drain" — a reference to the fact that the cream of India was leaving for the lucrative shores of England and America.
    在20世纪60和70年代，我的祖国印度的政客们常常喊着"制止人才外流"的口号, 它所指的实际上是这样一个事实: 印度的精英们正在离开印度，到能够赚钱的国家——英国和美国去。

3. Yet their numbers create a drain on resources that can't be renewed.
    而这一小部分却造成了不可再生资源的流失。

4. George took off his jacket, rolled up his sleeves and pushed his right arm through the drain cover.
    乔治脱掉外套，卷起袖子，将右胳膊伸进了阴沟盖。

5. Comments about "the Brain Drain" don't hold much water when every politician has a son or daughter aiming to go abroad.
    当每一个政客都有一个儿子或女儿在往国外钻的情况下，有关"人才外流"的批评就不会有实际的意义。

6. On his way to the sweet shop, he dropped his fifty pence and it bounced along the pavement and then disappeared down a drain.
    在他去糖果店的路上，50便士掉在地上，在人行道上跳了几下，掉进了阴沟里。

7. I was, indeed: the hole that has been surgically cut to drain urine had changed size and the connection to my urine bag was leaking.
    我确实多用了，因为外科手术所造的排尿孔的大小改变了，于是尿袋的连接处发生渗漏。