idiom
we'll cross that bridge when we come to it
我们不会担心可能发生的未来问题,而是如果发生了我们再处理
Meaning
we will not worry about a possible future problem but will deal with it if it happens
Example
I don't know how we'll pay for the repairs, but **we'll cross that bridge when we come to it**.
我不知道我们怎么支付修理费,但到时候再说