make busy

• n. 占线

make busy的用法和样例：

例句

用作名词 (n.)

1. The operator told the caller that the line is busy.
   接线生告诉打电话的人对方电话占线。
2. I tried to call Mr. Cooper,but the line was busy.
   我想给库柏先生打个电话，但一直占线。