The food issue is not only an economic issue, but also a political one, related to the long-term stability of the country.

如果汽车的发展周期与计算机相同，今天的劳斯莱斯将只需100美元，每加仑行驶一百万英里，并且每年爆炸一次，杀死车内所有人。

We must remember that this is a very small star and probably some of the larger and the more important stars and may be very virtual and happy.

预测蓬勃发展的积极情绪与消极情绪的比例约为3比1。高于这个比例，人们往往会蓬勃发展；低于这个比例，人们往往会萎靡不振。

The speech we hear is an indication of that which we don't hear.

投资农民教育能带来最高的回报。

我不认为每个人都应该成为数学家，但我确实相信许多学生没有给数学一个真正的机会。