其中的确切机制仍然是神秘的,但许多癌症是在基因水平开始的这种可能性表明,我们永远不可能预防所有癌症。
The exact mechanisms involved are still mysterious, but the likelihood that many cancers are initiated at the level of genes suggests that we will never prevent all cancers.
理想的情况是模型中的所有变动都立刻反映到实现中,但实现这种理想情况基本上是不可能的。
Ideally, you want any changes in the model to be instantaneously reported in the implementation, but it is seldom possible to achieve this ideal.
匆忙中我想我所有的罐中-但你明白,是不可能的。
In the haste I tried to carry all my cans - but as you understand that was not possible.
He wants you to finish everything by tomorrow, but you think it's impossible.
他想让你在明天之前把所有事都做完,但你觉得这肯定是不可能的。
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