Definition
This idiom is used to express that something is certain to happen at some point in the near future.
指早晚的事
If they continue to ignore environmental issues, it's only a matter of time before an environmental disaster occurs.
如果他们继续忽视环境问题，环境灾难的发生只是时间早晚的问题。
If this company does not improve its product quality, it's just a matter of time before it goes bankrupt.
如果这家公司不提高产品质量，破产只是时间问题。
With the continuous advancement of technology, it is only a matter of time before self-driving cars become widespread.
随着技术的不断进步，自动驾驶汽车的普及只是时间问题。