Everyone knows that if he shouts in the vicinity of a wall or a mountainside, an echo will come back.

大家都知道，在墙壁或山腰附近发出的喊声，就会听到回声。

When it has been decided where we are going to drill, we put up at the surface an oil derrick.

当确定钻孔地点后，我们就在那里竖起一个井架。

and another group were disturbed for an equal period of time but when they were no exhibiting eye-movements,

另一组人也是连续几夜被叫醒，但是在眼球队没活动时被叫醒的。

The open sea was deep and mysterious,

无边无际的海洋深邃而又神秘，

Such administrative overheads in a business are analogous to the cost of government in a nation.

一家企业的这种行政管理开支类似于一个国家的政府管理所用的开支。

begging response from those around them.

询问周围人的反应。