People are often hesitant to terminate a project when they've already invested time or resources into it, even if it might make logical sense to do so.

当人们已经在项目上投入了时间或资源时，他们常常会犹豫是否要终止项目，即使这样做是合乎逻辑的。

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Not long ago, he found that the bluebirds were nesting in the dead trees which were often cut down, so he began to make bluebird boxes for the birds in order to save them.

不久前，他发现蓝知更鸟在枯树上筑巢，而这些枯树往往会被人们砍去，于是他开始为这些鸟制作蓝知更鸟箱，以拯救它们。

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So it can often make a lot more sense if we think about things in terms of energy.

通常我们从能量的角度来，考虑就能更好的理解这点。

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So it can often make a lot more sense if we think about things in terms of energy.

通常我们从能量的角度来,考虑就能更好的理解这点。

麻省理工公开课 - 化学原理课程节选

What we need to do is get rid of the Coulomb tag that we have - that's how we measure our electron charges - charge, and so we use this epsilon nought quite often, this permativity constant of a vacuum to make that conversion.

怎么量度电子电荷,所以我们会经常用到,这个epsilon，nought记号,这是真空中的介电常数,我们还要指出,这个介电常数。

麻省理工公开课 - 化学原理课程节选

So often, we make initial business contacts by e-mail or through social media, such as LinkedIn and Twitter.

FORBES: How To Make A Lasting Impression

Every so often, they make you cry.

FORBES: Success Is Easy: 5 Things Executives Can Learn From The Gaping Void

But when you even hint at such a thing, and begin doing so often, and make it an accepted tone of discourse, sooner or later the truly crazed will sit up and listen, and you will reap the whirlwind.

FORBES: Gabrielle Giffords and Media Vitriol