This morning the sky is grey and it is drizzling. It may well clear up because when it rains here it usually does not last for long.
今天早上天空灰蒙蒙的下着毛毛雨，很快会转晴的，因为这里下雨的时候通常不会延续很长时间。
However, this usually does not last for long. This is an important lesson for us:we can solve a problem(problem), bylearning to forget.
但是，这种不友好通常不会持续很久。这对我们来说是个重要的教训：我们可以通过学会忘记来解决一个问题。
Although this problem does not undergo systematic research, but involve in the theory and practice more, and last for a long time, become the real problem that can't be avoided.
该问题虽未经系统的研究，然而在理论和实践中多有涉及，且历时已久，成为无法回避的真正问题。
But given the effects on cloud formation and dissipation (a cloud laced with black carbon does not last as long) the potential for error in estimating the final effects is large.
考虑到云的聚集和散开（由炭黑聚集的云并不会持续很久），最终结果可能会存在很大的错误。
A typical scenario is that you have been using a notebook or Tablet PC on the battery for several months and you notice that it does not last as long on a single full charge as it used to.
一个典型的情况是你在电池模式下使用笔记本或者掌上电脑几个月后，你将会留意到电池充满电以后持续使用时候不如以前一样长。
A typical scenario is that you have been using a notebook or Tablet PC on the battery for several months and you notice that it does not last as long on a single full charge as it used to.
一个典型的情况是你在电池模式下使用笔记本或者掌上电脑几个月后，你将会留意到电池充满电以后持续使用时候不如以前一样长。
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