Operational safety
[计] 操作可靠性
🧩 词语组成解析
🗣️ 情景例句
He never speaks unless he is spoken to.
除非别人先对他开口，他从不先开口。
It's nice to see you again. Have you changed jobs?
又见到你很高兴。你换了工作了吗？
So, in an earthquake, the earth shakes.
因此，地震时，地球震动。