现在，新的研究又证明，在吸烟者环绕的环境里生活或工作的人，可能还会遭受心理上的伤害。

Now, a new study adds to evidence that non-smokers who live or work around smokers can experience psychological harm as well.

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有时神秘主义者也会送来一群群的活乌鸦，我相信它们被叫做“凶手”，呱呱叫着环绕我们俯冲过来。

Sometimes the mystics sent live flocks of them, "murders," I believe they're called, to swoop around us, cawing.

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但如果讲话者发出太多声音，回转回麦克风，环绕并行程一个循环，声音逐次变大。

But if too much of the sound from the speakers goes back into the mic it goes around and around in a loop getting louder each time.

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