So sediment is transported and then deposited and it forms layers on the Earth's surface over time.
所以沉积物被运输,然后沉积,随着时间的推移,它在地球表面形成了层。
We wanted to know if the length of time food is in contact with a contaminated surface affected the rate of transfer of bacteria to the food.
我们想知道食物与被污染的表面接触的时间长短是否会影响细菌转移到食物上的速度。
The overall number of bacteria on the surface mattered more, and this decreased over time after the initial introduction.
表面上的细菌总数更为重要,且在初次注入细菌后,细菌总数会随着时间推移而逐渐减少。
Volcanic activity broke the large island into pieces that came to the surface of the sea over time.
VOA: special.2009.12.16
I don't believe we'll-- I'll--come close to scratching the surface of what I would enjoy doing, by the time I've died.
我不能相信-,我能推测死时,自己会对什么感兴趣。
At the same time, hot liquid rock from deep in the Earth pushed to the surface.
VOA: special.2009.01.07
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