Pemf
[医][=pulsating electromagnetic field]脉冲电磁场
🗣️ 情景例句
A murder occurred last night in this very district.
就在这个区昨晚发生了一起凶杀案。
The end justifies (or sanctifies) the means.
只问目的，不问手段。
Ducks know how to swim when they are born.
鸭子天生会游泳