The two chief problems in installing the sliprings in the bullet seemed to be the temperature problem and the drive problem.

把滑环装在排气锥体中的两个主要问题是温度和传动。

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And I'm going to show you an example in a 1 second, just to drive this home, but notice the characteristics. In the first two cases, the problem reduced by 1 at each step.

在前面两个例子里,每一部问题的规模缩小了,不管是迭代的还是递归的，这表明这个问题的复杂性可能是线性的。

麻省理工公开课 - 计算机科学及编程导论课程节选

How much energy are you going to get out, and how far are you going to be able to drive a car with this expansion, let's say, so that's the problem.

你能获得多少能量，利用这次膨胀,你可以把你的车开出多远，比如说这就是问题所在。

麻省理工公开课 - 热力学与动力学课程节选

Sheikh Mogra said grooming should be seen purely as criminal behaviour, and using "labels of race or religion" could "drive the problem deeper underground".

BBC: Shaykh Ibrahim Mogra of the Muslim Council of Britain

Government ministers are proposing a minimum price of 45p a unit for the sale of alcohol in England and Wales as part of a drive to tackle problem drinking.

BBC: File photo of a person drinking a bottle of beer

The MacBook Air's lack of an optical drive could also be a problem for people visiting customers, Werner pointed out.

FORBES: Into Thin (MacBook) Air