Physical security
[计] 物理安全性
🧩 词语组成解析
🗣️ 情景例句
This career move is a step in the right direction.
这次变动是你在事业上的一次迈进。
What were you doing when I called?
我打电话给你时你在干吗？
We need three times as much as we originally ordered.
原来的三倍。