口袋橡胶玩具球是个好东西。

A pocket koosh ball is a good thing.

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正常来说 希望当然是个好东西。

Normally, of course, hope is a wonderful thing.

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归根到底，也许罪恶感是个好东西。

So perhaps guilt is good after all.

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We are accustomed to thinking of insurance as a good thing.

人们已经习惯性地认为保险是个好东西。

耶鲁公开课 - 金融市场课程节选

And so, he has put this chemistry to use in this robotic arm and they call it Fido, because often dogs are the creatures that have to go out and detect these things, and it's not a great job if you're a dog to be sent out to see whether there was an explosive and discover yes, there was, a little bit too late.

因为通常都是派狗去检查这些东西,这个不是个好工作，如果你是一只狗,被派去检查是否有爆炸物，然后你发现有,那就来不及了,所以用机器手检查化学物质。

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