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1·You must drop back from vessel ahead of you.

你船必须拉开与前面船的距离。

2·Advise you drop back from vessel ahead of you.

建议你船拉开与前面船的距离。

3·In 20 minutes your blood pressure will drop back down to normal.

20分钟内你的血压将降至正常水平。

4·The early leaders drop back and allow others to make the running.

开始时领先的人纷纷落下，让别的一些人跑到了前头。

5·As soon as we reached the little village, we got the order to drop back.

我们刚到这个小村庄，就接到返回的命令。

6·What most people don't expect, but do fear, is a drop back into recession.

绝大多数人都不希望看到而又害怕面对的一个问题就是经济重陷衰退。

7·The American runner had decided to drop back and let somebody else take the lead.

这位美国赛跑运动员决定放慢速度，让另外一个人领先。

8·Learning is like rowing upstream, not to advance is to drop back. -chinese Proverb.

学如逆水行舟，不进则退。-中国谚语。

9·Sometimes, you have to drop back a few steps when a particular design decision doesn't make sense.

有时候，可能会发现某个设计决策是没有意义的，这时就必须后退几步。

10·When the radon levels of the water subside and drop back to normal readings, an earthquake may occur.

当水中氡的含量下降，回到正常读数时，地震就可能发生。