be (only/just) a matter of time
US /biːt əˈraʊnd ðə bʊʃ/
UK /biːt əˈraʊnd ðə bʊʃ/

1.
时间问题
used to say that something is certain to happen, although you do not know when
:
•
It's only a matter of time before someone gets hurt if they don't fix that broken step.
如果他们不修理那个坏掉的台阶,有人受伤只是时间问题。
•
With their current performance, it's just a matter of time until they win the championship.
以他们目前的表现,赢得冠军只是时间问题。