Facial expressions aren't as important in live performances generally, because the choreographer knows that someone in the back row of a theater may not be able to see a dancer's face clearly.

面部表情在现场表演中通常不那么重要，因为编舞者知道坐在剧院后排的人可能看不清舞者的脸。

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What is meant by "enduring insults"? It means to be able to see clearly, in whatever situation, that it is our own karma, and not other's fault.

忍辱是什么呢？就是不管怎么样，都认清是自己的因果，不是别人的错。

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Sometimes you'll not be able to see where you are going in life, clearly. But know that your soul's inner GPS will guide you home.

有时你无法看清生活的方向，但是你灵魂深处的导航会指引你回家。

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Yet the big unknown, according to Kanas, does not involve who astronauts will not be able to talk to or what gifts they will not be able to get, but instead what they will not be able to clearly see: planet Earth.

CNN: Mars on the brain? Red Planet pioneers to face cosmic mind trip

They may be driving while not able to see road signs clearly anymore or may be wearing glasses for driving which are no longer suitable.

BBC: NEWS | Health | Many drivers 'have poor eyesight'