He wants to see them beg for mercy.

他想亲眼看着他们求饶。

《牛津词典》

I beg for mercy for my poor friend, Harlequin, who has never done the least harm in his life.

我为我可怜的朋友哈利昆求饶，他一生中从未做过哪怕是最轻微的伤害。

youdao

Good Sir, I beg for mercy.

尊敬的先生，我请求宽恕。

youdao

The kind of place where the waiters pile slices of pig, lamb and other farm animals on your plate until you beg for mercy.

FORBES: Magazine Article

Unfortunately, the chattering classes are behaving as though when faced with the specter of further European economic sanctions, we have no option other than to throw ourselves at Europe's feet and beg for mercy.

CENTERFORSECURITYPOLICY: Richard Goldstone and Palestinian statehood

We are all at the mercy of biological chance, and I once again beg for your liberal tolerance.

FORBES: Morrissey Postpones Shows, Pens Entertaining Apology