C4
abbr. 补体4（complement 4）
🗣️ 情景例句
My private life is none of your business!
我的私生活不关你的事。
His argument doesn't hold water.
他的论点站不住脚。
Apart from any moral considerations this is a stupid method of training,
且不说道义问题，这本身就是一种愚蠢的训练方法，