Sounds simple enough, but more often than not we move from one experience to the next without any real consciousness, and certainly without a decision to concentrate.
听起来似乎很简单，但事实上，能做到的人不多。一般人之所以不够专注，其注意力从一件事转移到另一事往往都是无意识的行为，当然不会有强令自己专注的自觉意识。
The earth could certainly not support 10 billion hunter-gatherers, who used much more land per head than modern farm-fed people do.
当然地球无法支持100亿个过狩猎采集生活的人，因为他们人均需要的土地比现代依靠农业养活的人要多得多。
It was certainly a smaller room than those up stairs, but I was more comfortable, for I was not being continually taken hold of and pulled about by the children as I had been.
当然，新屋子要比楼上的小很多，可我觉得很舒心，因为我不会再时不时地被抓过去或被孩子们拽来拽去啦。
In any case, this developer is certainly not going to be helped by XML namespaces, which are far more complicated than keeping track of state.
无论哪种情况，XML名称空间都不能为开发人员提供什么帮助，它要比记录状态复杂得多。
So, it's more subtle than that, but certainly if it's not conservative then it's not a gradient, and you cannot do what we said.
这确实有些微妙，不过如果它不保守，就肯定不是梯度，就没有之前那些性质。
When invoking unknown code (which listeners certainly qualify as), it is prudent to execute it in a try-catch block so that ill-behaved listeners do not do more damage than necessary.
在调用未知代码(侦听器就是这样的代码)时，谨慎的方式是在try - catch块中执行它，这样，行为有误的侦听器不会造成更多不必要的破坏。
While Prof. White is more optimistic about head transplants than most doctors, he is certainly not regarded as a kook and his research is closely followed.
虽然怀特教授对于头颅移植术比大多数医生更为乐观，但他没有被人当作傻瓜，他的研究工作受到人们密切关注。
In fact, Descartes concluded that the human mind was not capable of knowing anything more certainly than God's existence.
事实上，笛卡尔的结论是，人的心灵是没有能力知道什么更多的肯定不是上帝的存在。
People who can't concentrate for more than a few minutes at a time are almost certainly not doing their best work.
无法持续几分钟以上集中精神的人，几乎肯定做不好他们的工作。
To me, they seem a bit more emotionless than I'd expected, even via Nancy, though certainly not humorless or without personality!
在我看来，他们似乎比我预期中缺乏一点感情，甚至通过南茜也是如此，虽然肯定他们并不是缺乏幽默感，或者没有个性！
Why not consider another way to save the planet, which requires no despair (if we act fast enough) and certainly less difficulty than coping with the escalating onslaught of ever more scary crises?
那些不那么令人绝望（只要我们行动足够快）的措施？处理越来越可怕的危机日益严重的冲击是困难的，那么我们是否应该采取较为容易的方式呢？
Why not consider another way to save the planet, which requires no despair (if we act fast enough) and certainly less difficulty than coping with the escalating onslaught of ever more scary crises?
那些不那么令人绝望（只要我们行动足够快）的措施？处理越来越可怕的危机日益严重的冲击是困难的，那么我们是否应该采取较为容易的方式呢？
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