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
Just the regular.
平信就好了。
Easier said than done.
说时容易做时难。
Yes, Mom! I'll do it right away.
听到了，妈妈！我这就去。