elow 副词.再如：
We climbed rather perilously down a rope-ladder to the boat below.
我们冒着相当大的危险沿着绳梯爬到了下面的船
Spread out below was a great crowd.下
面是摩肩接踵的人群.
介词置于名词前.如
They have designed a system which pumps up water from 70m below ground..
他们设计了一套从地下70米处抽水的系统.
而副词一般单独置于句末.