When we use it up, we'll have to wait million of years for it to build back up, or figure out some non-prohibitively expensive way to recover it from the atmosphere.

用光之后，我们将不得不等上数十亿年使它们重新产生，或者想出一些不至于昂贵到令我们望而却步的点子，直接从大气中收集氦气。

youdao

To build up a better picture of fluctuations appreciably further back in time requires us to use proxy records.

为了更好地了解更早时期的波动，我们需要使用代理记录。

youdao

But while you're trimming expenses, cut back a little more so you can build up your emergency fund.

但是当你减少花销时，请削减的多一些，这样就可以建立你自己的紧急账户，以备不时之需。

youdao

What I really love about New Moon is you see this girl really build herself back up and by the time she makes the sort of rash decision to spend eternity with a vampire, you believe her.

VOA: standard.2009.11.23

I have yet to show you the solution to a wave function for the hydrogen atom, so let me do that here, and then we'll build back up to probability densities, and it turns out that if we're talking about any wave function, we can actually break it up into two components, which are called the radial wave function and angular wave function.

我还没有给你们看过,氢原子波函数的解，让我现在给你们看一下，然后再来说,概率密度，实际上,对于任何一个波函数来说，我们可以把它,分解为两部分，分别叫做径向波函数,和角向波函数。

麻省理工公开课 - 化学原理课程节选

At a time when aging baby boomers might be retiring, they continue working in order to build back up the retirement savings they lost in the economic chaos.

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The pair of motors, gearboxes and pulleys would then be used to provide assistance in two degrees of freedom, to help stroke victims slowly build back up their strength.

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"In this country, we love to build people up, tear them down and then build them back up again, " he says.

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