To add a further problem, second line treatments for these diseases are expensive and in short supply.

此外，还有另一个问题，即针对这些疾病的二线治疗费用很高，而且供应短缺。

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The first focus on the idea of personal growth and the second tackle a particular problem, for example depression or anxiety.

第一类是主要是关于个人成长，而第二类则侧重解决一些实际问题，比如沮丧或者忧虑。

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And now we come to our second problem.

现在，我们讨论第二个问题。

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But in terms of SI units, which become much more useful if you're actually trying to use intensity in a problem and cancel out your units, we're just talking about joules per second is what intensity is.

但是用国际单位制，这个变得越来越有用了,如果你实际上在使用强度,来解决问题和约化单位，我们仅仅讨论每秒钟的焦耳,这就是强度。

麻省理工公开课 - 化学原理课程节选

If the units are supposed to come out in meters per second and you get seconds per meter, what do you figure the chances of that problem being right are?

因为如果单位本应该是米每秒,但你写的是秒每米，你认为这个题目,还有正确的机会吗？

麻省理工公开课 - 固态化学导论课程节选

The second problem is, 1 suppose actually I had p 1 and p 2 were in polar form, and I ran add points on them.

第二个点也就是，半径为3角度为1,也就是差不多在这，那么什么点，对不起。

麻省理工公开课 - 计算机科学及编程导论课程节选

First, an uncertainty about the exact nature of the problem and second, the inevitable delays in assessing data which had to be extracted on our re-supply flights before it could be analysed.

BBC: Arctic team: 'London, we have a problem'

The second, and related, problem is that some of the asset classes were quite small.

ECONOMIST: Spreading the risk has spread the losses

Indoor air pollution (IAP) is an excellent example: A massive global problem and the second-largest driver of global warming, IAP causes over 3.5 million needless deaths each year, mainly in the developing world, and has a disproportionate impact on women and children.

FORBES: Where There's Smoke, There's Fire: A Call to Action for Better Indoor Air Pollution Research