Emergeney signalling
[化] 事故讯号装置
🧩 词语组成解析
[计] 信号传输法
🗣️ 情景例句
I made an appointment with the doctor at three.
我和医生约好3点钟看病。
Mr. Smith is still in his fifties.
史密斯先生仍然50几岁。
Imagine an earthquake shock shaking the floor, the paper, you and your hand.
假定地震发生了，地板、纸、你和你的手都会动，