One problem with the collision hypothesis is the question of how a satellite formed in this way could have settled into the nearly circular orbit that the Moon has today.

碰撞假说的一个问题是，以这种方式形成的卫星是如何在月球现在的近乎圆形的轨道上运行的。

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The existing times make the question of eating a rather tricky problem: one has to have either early dinner or late supper.

现在的时代让吃饭成为一个相当棘手的问题：一个人必须要么早吃晚餐，要么晚吃夜宵。

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Whether this will happen is another question, but at least the problem has been acknowledged.

他的承诺是否能兑现又是一个问题了，但至少这个问题已经得到了承认。

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Once the problem of handling fabric has been solved, the next question is how to sew it into the right shape.

ECONOMIST: Automated tailoring comes closer

On the first question, Mr Cardoso has a credibility problem: a year ago, when the real first came under attack and he announced a similar package, public spending subsequently rose.

ECONOMIST: Cracking the Brazil nuts

But it has not cracked the problem of inner-city poverty, nor the biggest social question of the age: how can an excluded social class find its way into the mainstream?

ECONOMIST: Chicago's current success may be about as good as it gets