knuckle under的用法和樣例：
例句
用作動詞 (v.)
- They came under the yoke of the English.
他們向英國人低頭認輸了。 - Tom did not knuckle down under the attacks.
面對這些攻擊，湯姆並沒有屈服。 - His army never came under the yoke of invaders.
他的軍隊從來不向侵略者屈服。
