it's (only/just) a matter/question of timeused to say that something will definitely happen at some time in the future, but you do not know when 这（只）是个时间问题〔指某事肯定会发生〕 I’ll find the key eventually. It’s just a question of time. 我总会找到钥匙的，只是个时间问题。
It’s only a matter of time before we catch the person who killed her. 我们迟早会抓到杀害她的凶手。
it’s (only/just) a matter/question of time• But they believe it's only a matter of time before the disease crosses the county boundary.• If he hasn't already killed somebody, then it's only a matter of time.• They think it's only a matter of time before he breaks.
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