Security maintenance
[计] 安全维护
🧩 词语组成解析
🗣️ 情景例句
There is, Dad.
有， 爸爸。
If I went with you,I'd have to be back by six o'clock
如果我与你一起去了，我将不得不在6点钟回来。
I'll tell my mother what we've decided to do.
我要告诉我妈妈我们的决定。