nemesis

死敌（名词）

(noun) An unbeatable opponent that causes great harm or ruin.

EXAMPLE: The terrible winter snowstorms were the invading army's nemesis, and after seeing thousands of his brave soldiers trapped and dying in the snow, the general called for a retreat.

冬天可怕的暴风雪是入侵军队的大敌。在看到他的数以千计的勇敢战士困在雪中死去后，这位将军下令撤退。

the only game in town

唯一选择（成语）

(IDIOM) The only available choice; something that must be accepted regardless of its quality or desirability.

EXAMPLE: We live in an isolated rural region and one shabby but expensive old inn is the only game in town, so all business travelers have to stay there.

我们生活在一个与世隔绝的农村地区，只有一家破败但昂贵的老酒店，因此所有的商务旅行者都只能住在那里。