Editor: What is do you think the turn point of your life?

艺术经纬：有没有什么事情是你觉得是对您人生有转折意义的？

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Reflections from Windows and eyeglasses produce superimposed views, and complex optical systems, such as camera lenses, can turn point sources of light into apparently saucer-shaped phenomena.

窗户和眼镜片的反光会造成重叠的影像，而例如相机镜头这样精密的光学系统会将点状光源扩散为看似碟形的现象。

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I was able to turn the corner at an important point in my studies, going from nearly failing math to passing it.

我在学习上实现了重要的转折点，从数学几乎不及格到合格。

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There is a point at which fear may turn to insanity;

VOA: special.2009.10.31

The answer could turn out to be yes, for all we know at this point.

这个答案也许是肯定的,我们都知道这一点

耶鲁公开课 - 死亡课程节选

If you decide to opt in by a pass fail, I just need to sign your white study card or if you wanna decide before the 5th Monday, just grab the pink slip and I can sign that and you can turn that in at any point and I'm happy to chat during break today or after class if you have any questions or concerns.

如果你上我们的课程只是要一个分数，那么我只需要在你的白卡片上签个名就可以了,或者说，如果在第五周的周一前还没考虑好，把你的解聘书拿来，只要我签个字,任何时候你都开以离开我的教室,当然，如果你有任何问题和疑虑,我也很高心和大家做课下交流。

哈佛公开课 - 计算机科学课程节选

For that, we must turn to point two, the history of Nationalism.

BBC: Fighting the law

"We would basically try to get the child to look one way, we'd turn and point to a clock and see whether or not the child would notice it, " explained Piven.

CNN: Toddler brain difference linked to autism

"Leaf is on a mission to turn standard point of sale into point of smart interactions for small businesses, so it's important that we stay on the cutting edge of technology, " said Aron Schwarzkopf, CEO of Leaf.

ENGADGET: Leaf unveils next-gen LeafPresenter Android POS tablet for taking payments