to pipe down
01
安静下来, 闭嘴
to stop talking or making noise
语法信息
形态构成
短语
动作动词
规则
不可分离
小品词
down
基本动词
pipe
现在时
pipe down
第三人称单数
pipes down
现在分词
piping down
一般过去时
piped down
过去分词
piped down
例子
Whenever the teacher enters, the students usually pipe down.
每当老师进来时，学生们通常会安静下来。
02
使安静, 让闭嘴
to cause someone or something to become quiet
例子
The teacher tried to pipe down the noisy classroom by turning off the lights momentarily.
老师试图通过暂时关灯来平息吵闹的教室。
