Secon
abbr. secondary electron conduction orthicon 次级电子导电正析像管
🗣️ 情景例句
And we'll also need some ladders
而且我们还需要一些梯子
He seldom came to see his wife, did he?
她不来看他妻子，是这样吗？
Ready? Go! Mr. Hu shouted, and the boys started to run.
“预备--跑！”胡先生喊道，男孩子们开始跑。