The problem was that after successfully floating over one wave you find that there is another one behind it just as strong and ready to flood your boat.

VOA: special.2011.04.09

One problem is that they're not always accurate and there's a couple of factors that could lead them away from accuracy.

其中一个问题就是它们并不总是准确的,有几个因素,能减低它们的准确性。

耶鲁公开课 - 心理学导论课程节选

And one problem is that "For depression" is that there's too little of a neurotransmitter known as serotonin.

抑郁症的问题就在于,缺乏一种叫做血清素的神经递质

耶鲁公开课 - 心理学导论课程节选

OK. You can see that thing is cutting down the problem in half each time, which is good, but there's one more thing I need to deal with.

这很棒，但是我们还需要处理另外一件事情,让我们仔细来看看,我在开始做之前一直在说，应该先试验试验。

麻省理工公开课 - 计算机科学及编程导论课程节选

In the famous battle of Marathon, which I will tell you about when we get there, one of its features is that because the Greeks were numerically badly inferior to the Persians, they had this problem of covering the line.

比如在著名的马拉松战役,迟些我们会讲到,马拉松战役中,希腊军队,在人数上远不敌波斯军队,这为布阵造成很大的困难

耶鲁公开课 - 古希腊历史简介课程节选

And I think--This strategy is one I'm very enthusiastic about but there still remains what's sometimes called the "Hard Problem of Consciousness" and this involves subjective experience.

这是我所热衷的策略,但却依然存在着,所谓的"意识难题",而这牵涉到个体的主观感受

耶鲁公开课 - 心理学导论课程节选