compound的词根为pound
例句
1、
The plumber packed the joint of the pipe with string and a special compound.
这个装修水管的工人用绳子以及一种特殊的复合物把管子的接头包垫起来。
2、
Concealed video cameras scan every part of the compound.
几台暗藏的摄像机把院子里的每一个角落都拍了进去。
3、
A compound sentence contains two or more clauses.
复合句包含两个或多个从句。