Undergirds
vt. 在底部加固（undergird的第三人称单数形式）
🗣️ 情景例句
Never in my life have I seen such a mess!
我这辈子没见过这么乱的地方。
Don't try judge young people by their appearance.
不要从外表去判断年轻人。
Sit down, please.
请坐。