Instead,I spent all my time, and a lot of my money, trying to build the perfect microscope.

VOA: special.2009.07.25

So, my perfect pre-med/bio plan was getting a little shaken right from the start, and the reason that it was getting taken was because I would learn this new principal in chemistry and because I was taking bio with the same time, I could see the connections.

所以我的完美的医学预科,和生物学的计划，从一开始就小小的动摇了,原因就是我一边学习这些化学原理,一边学生物,我可以看到两者之间的关联。

麻省理工公开课 - 化学原理课程节选

So, this is my question to you: how complete and perfect is the image of Providence that hovers moonlike over the pages of Paradise Lost?

因此，我的问题是：，这里如月亮一般,在的字里行间反复出现的天意的形象,到底是有多么的完整和美好？

耶鲁公开课 - 弥尔顿课程节选

"Do not doubt my power. I am ready to make this cheek as perfect as its pair."

VOA: special.2009.09.26

So any time I draw these molecular orbitals, I do my best, and I'm not always perfect, yet trying to make this energy different exactly the same for the anti-bonding orbital being raised, versus the bonding orbital being lowered.

所以我在画这些分子轨道的时候，虽然不是很完美，但我总是尽量,让反键轨道引起的，能量升高和成键轨道。

麻省理工公开课 - 化学原理课程节选

"I wasn't gone.I was alive in my own perfect world, but in my heart I knew it wasn't perfect.

VOA: standard.2010.01.08

And I didn't think my contry was perfect.

我不认为我的国家完美。

普林斯顿公开课 - 国际座谈会课程节选

I knew that my country was not perfect.

我知道我的祖国不完美。

普林斯顿公开课 - 国际座谈会课程节选