Definition
This idiom is used to express the idea that if one cannot defeat an opponent or a prevailing trend, it is better to join them or conform to it, often implying a reluctant acceptance of the situation.
打不過就加入、打不赢他們，就加入他們。
They initially opposed the merger, but eventually realized that 'if you can't beat 'em, join 'em' was the best course of action.
他們最初反對合併，但最終意識到『打不過他們，就加入他們』是最好的做法。
I wanted to start my own company, but the tech industry was too competitive, so I decided to 'if you can't beat 'em, join 'em' and went to work for a large corporation.
我本想創辦自己的公司，但科技行業競爭太激烈，所以我決定『打不過他們，就加入他們』，去了一家大公司工作。
Although he disliked politics, he decided to 'if you can't beat 'em, join 'em' in order to make a difference on the local council.
雖然他不喜歡政治，但他決定『打不過他們，就加入他們』，以便在地方議會中有所作為。