Canceller
n. 消除器, 补偿设备
✅ 同义词
🗣️ 情景例句
Don't be mixed up in such business.
不要跟这种事有所关连。
How much will that be altogether?
总共多少钱？
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。