Si op. sit.
[医] 必要时
🧩 词语组成解析
[计] 国际单位制, 串行接口, 移入\\n[医] 硅(14号元素,旧名矽)
🗣️ 情景例句
He missed a phone call.
他没接到一通电话。
No. I was planning to stay home.
不，我打算呆在家里。
Don't count on me.
别指望我。