Security department
保卫处
🧩 词语组成解析
🗣️ 情景例句
Particularly in the construction field.
特别是在建筑业。
Cast not your pearls before swine.
明珠莫投暗。
The man had connected the air-line to a supply line of oxygen, not compressed air.
这个工人把供气管接到了氧气供应管上，而不是接到压缩空气管上。