Pentode
n. 五极管, 电子五极管\\n[电] 五极管
🗣️ 情景例句
I am exhausted. My new exercise class is so hard.
我太累了。我那新的健身班太难了。
It's faster but more expensive to ship goods by air.
空运较快但运费较高。
No, Mom, said Lucy. I forgot the money!
“没有，妈妈，”露西说，“我忘记带钱了！”