Lynchpin
n. 关键
✅ 同义词
🗣️ 情景例句
Think no more of it.
别再想它了。
He that has a tongue in his head may find his way anywhere.
遇事多问，随处可行。
I don't know how to express my gratitude.
我不知道怎样来表达我的感激之情。