Cathetron
[电]外控式三极汞气整流管
🗣️ 情景例句
What kind of guarantee do you offer?
这种车有售后服务保证吗？
From all listed prices we allow a discount of 10 percent on orders received on or before 31st May.
5月31日或此前收到的订单，我们都按价目单上的价格给10%的折扣。
It was raining heavily and they found that a stream had formed in the field.
雨下得很大，他们发现地上已经形成了一条小溪。