Cathetron
[电]外控式三极汞气整流管
🗣️ 情景例句
And if I can be of any help,
如果我能有所帮忙的话，
I grew up right here in this neighborhood.
我恰好在这附近长大了。
It marked the end of the great tradition of ships with sails and the beginning of a new era.
它标志着帆船伟大传统的结束与一个新纪元的开始。