Let them do their worst—we'll fight them every inch of the way.

随便他们干什么坏事吧，我们一定和他们拼到底。

《牛津词典》

Floods, like famines, do their worst damage in the weeks and months after the highest waters have subsided.

洪水与饥荒一样，在最高浪潮退去后的数个星期和几个月里破坏程度最高。

youdao

But let storm and avalanche do their worst, and let the pine find only a ledge of vertical precipice to cling to, it will nevertheless grow straight.

可是，尽管风暴和雪崩恣意摧残，尽管松树所能依附的只是陡壁上一块凸出的岩石，它依然长得笔挺。

youdao

Officials in Morocco say it is time to regulate the trans-Mediterranean traffic rather than leave the underground networks to do their worst.

ECONOMIST: Morocco

Three academics, including CFA Institute senior managing director Robert Johnson, say stocks typically do their worst in the second year of a four-year presidential term.

FORBES: Obama's Second Year Could Spell Trouble for Stocks

Cowards do the worst of their work in secret or after midnight.

FORBES: Trading Peace for Justice in Tahrir Square