科恩博士说：“NHANES III是一项观察上的研究而不是一次临床试验，所以，关于因果没有一个确定的结论是可能的。”

Since NHANES III was an observational study and not a clinical trial, no definite conclusions about cause and effect were possible, says Dr. Cohen.

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巨大的抛射物撞击更大的天体，创造了各种各样的陨石坑，包括多环盆地——这是在行星和卫星上观察到的最大的地质特征。

Massive projectiles striking much larger bodies create various kinds of craters, including multi-ring basins—the largest geologic features observed on planets and moons.

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根据作者的说法，对于一个在观察、分析上受过训练的人来说，“欺骗”是不可能的事。

Deceit, according to him, was an impossibility in the case of one trained to observation and analysis.

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So there's all sorts of things that we have to obviously monitor, to keep track of that can influence our industry.

所以我们要观察的,显然有很多，才能跟得上信息技术行业的发展。

斯坦福公开课 - 戴尔CEO-Michael.Dell谈创业和发展课程节选

So, just looking at putting in the electrons, filling up the energy diagram here, we should be able to see a little bit why this is happening.

那么，仅仅通过观察这些电子的位置，在能级图上如何填充，我们应该就可以看出一点端倪。

麻省理工公开课 - 化学原理课程节选

At atomic length scale, limits on our ability to observe.

在原子长度问题上，我们的观察受限。

麻省理工公开课 - 固态化学导论课程节选