Alarm switch
[计] 报警信号开关
🧩 词语组成解析
switch
[swɪtʃ]
n. 开关;转换，转换器;软鞭子;[信]接线台;
vt.& vi. 转变，改变;转换;关闭电流;鞭打;
vt. 转换;挥动（棍棒、鞭子等）;迅速转动;鞭打;
vi. 交换;调换;
🗣️ 情景例句
What impressed you the most about Shanghai?
你对上海最深的印象是什么？
If I had had time,I would have called you.
如果我有时间，我就打电话给你了。
I had nearly reached the town, when the young man suddenly said, very slowly, Do you speak English?'
“你会讲英语吗？”