因此，我们不能有效地预测一场即将发生的地震发生的准确 时间 。

Therefore, we are not able to predict the TIME of an impending earthquake in a useful way.

youdao

不幸的是，现在根本无法预测出特大地震的精确时间、地点和规模，而且似乎永远无法做到。

Unfortunately, predicting the specific time, place, and size of particular large earthquakes is impossible at present, and is probably inherently impossible.

youdao

我们一般在大地震发生之后发布海啸预警，并预测海啸的抵达时间，因为海啸速度是由它所经过的水域深度直接决定的。

We issue a warning after a big earthquake, and we can predict what the tsunami arrival times should be because tsunami speed is directly controlled by the depth of the water through which it travels.

youdao