这是因为古生物学的核心就是将过去和现在的生物相互对比。
This is because, at its core, palaeontology works by comparing past and present organisms with each other.
我们能够运行一套双数模型，对北极气候的过去和现在经行对比，以此对未来北冰面和气候做出更为精确的预测和判断。
We can run a fully coupled model for the past and present and see what our model will predict for the future in terms of the sea ice and the Arctic climate.
新时期的文学艺术，它一方面表现在与过去文学艺术的决裂和对比中来确立未来道路；
The literature of the New Epoch . For one thing, it was establishing its approaching way with contrasting to and breaking the old literature and art.
不断地将他过去的处境和现在的处境相对比，表明平衡正向坏的一面倾斜，于是产生了一种终日忧郁或者至少是消沉的心态。
Constant comparison between his old state and his new showed a balance for the worse, which produced a constant state of gloom or, at least, depression.
有些考题要求考生就一个问题的过去和现在分别进行论述并进行比较，这类题目就是时间对比类考题。
Well, this is also the kind of problem I am going to deal with probably for a couple of years to come.
有些考题要求考生就一个问题的过去和现在分别进行论述并进行比较，这类题目就是时间对比类考题。
Well, this is also the kind of problem I am going to deal with probably for a couple of years to come.
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