Pentode
n. 五極管, 電子五極管\\n[電] 五極管
??? 情景例句
No. Please endorse the check at the back.
不會的。請在支票的背面簽名。
You look very serious about something.
你似乎有很嚴(yán)重的事。
What clothes did they wear?
他們穿什么？