kingpin
n
1 (engineering 工) vertical bolt used as a pivot 主销; 主螺栓.
2 (fig 比喻) essential person or thing 主要的人或事物
He's the kingpin of the whole team. 他是全队的主力.
🗣️ 情景例句
Mind your manners.
注意你的行为举止。
It doesn't work.
它出故障了。
I had no sooner got back to the kitchen than the doorbell rang loud enough to wake the dead.