Tappet
n. 梃杆, 凸轮从动件\\n[机] 挺杆
📖 牛津释义
tappet
n
projection in a piece of machinery that causes a certain movement by tapping against sth, used eg to open and close a valve 挺杆.
🗣️ 情景例句
know that I'm running for office
知道我正在竞选公职，
She is a reliable assistant.
她是个可信赖的助手。
What was wrong?
有什么问题吗？