Sealed transistor
[计] 密封品体管
🧩 词语组成解析
a. 未知的, 密封的\\n[法] 盖印的, 经盖章批准或证实的, 密封的
🗣️ 情景例句
Sure, but never before have we had payment in RMB.
当然可以，不过我们从来没有用过人民币付款。
It is easy to open a shop but hard to keep it always open.
开设店铺易，维持常开难。
Firemen had been fighting the forest for nearly three weeks before they could get it under control.
消防队员们同那场森林大火搏斗了将近3个星期才最后把火势控制住。