Toddlers cover their eyes when they're playing hide and seek in the belief that if they can't see you, you can't see them.

幼儿在玩捉迷藏的时候会遮住自己的眼睛，并且坚定地认为，如果自己看不到他人，别人也一定看不见自己。

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When you see somebody brought into the hospital, ill or dying, how can you send them away even if you know they can't afford the treatment?

当你看到某个生病或即将死亡的人被送到医院，即使你知道他们不能支付治疗费用，你又怎么能把他们拒之门外？

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Another fighter spoke up: "If you stand still in the dark and not move they can't see you."

另一个战士大声说道：“如果你在黑暗中站着不动，他们就不会看到你。”

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So, it's very well designed such that they've minimized any of these destructive interference dead sounds. So, it's nice, on a student budget you can go and get the worst seat in the house and you can hear just as well as they can hear up front, even if you can't actually see what's going on.

世界上最好的两三个音乐厅之一,它的设计十分精巧，把任何相干相消,都见到了最低，所以这点对于你们,用学生预算买到一个最差的位置的人,来说是很好的，你们可以听得,像前排一样清楚，虽然你们,可能看不见台上发生了什么。

麻省理工公开课 - 化学原理课程节选

If you can't see them, ask where they're kept.

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