Four wire circuit
[电] 四线电路
🧩 词语组成解析
four
[fɔr]
num. 四;四个;第四;
n. 四的;四个一组之物;
wire
['waɪɚ]
n. 金属丝;电线;电报;（木偶的）牵线，操纵绳，背后操纵的势力，秘密引线，秘密策略;
vi. 拍电报;
vt. 拍电报;给…装电线;
🗣️ 情景例句
I can't.
我不敢读。
Watch out, it's dangerous.
注意，危险啊！
but that was precisely the idea adopted in some of the early instruments (seismometers) for recording earthquake waves.
但是早期记录地震波的仪器（测震仪）正是采用了这种思路。