We really don't know where or when the "big one" will hit, but geologic evidence shows that the northwest coast of the U.S. has all the makings.
我们还不能确定下一场大地震发生在何时何地，但是地质分析中表明美国西北部发生大地震的可能性非常大。
Experts can't be certain where or when the next earthquake will be but the West Coast risk has increased because it is in the same volatile geological system.
专家并不能确定下次地震将在何时、何地发生，但西海岸地区由于相同的地理构造、发生地震的风险增高。
But not knowing where or when I would meet him only heightened the intrigue.
不过，不知何时何地能见到他反而让我感觉事情更加神秘。
If you're not sure where or when to get off, you can ask the driver or the other passengers.
如果你不确定何时要下车，你可以问司机或其他乘客。
Adverbials of manner, place, and time are used to say how, where, or when something happens.
方式状语，地点状语和时间状语用以表示某事发生的方式，地点和时间。
Adverbials of manner, place, and time are used to say how, where, or when something happens.
方式状语，地点状语和时间状语用以表示某事发生的方式，地点和时间。
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