As geologists, we examine layers of sediment on the Earth' s surface to approximate the dates of past geologic time periods.

作为地质学家，我们研究地球表面的沉积层以估算过去地质时期的年代。

youdao

We decided that we needed to change our target market from the over-45's to the 35-45's.

我们决定有必要把目标市场从45岁以上人群调整为35–45 岁之间的人群。

《柯林斯英汉双解大词典》

On the New Year' s Day, we Chinese always visit relatives and give gifts to each other.

在新年那天，我们中国人总是拜访亲戚，互赠礼物。

youdao

His mother's increasing deafness led the young man to study acoustics -- the way we hear and how sounds are made.

VOA: special.2010.05.14

We can never just have it there before us or, as I say, if we can--if we can--it's a very, very difficult act of concentration.

我们永远不能只面对着它，或者，要我来说，如果我们可以的话，那将需要高度集中注意力，这是很难的。

耶鲁公开课 - 文学理论导论课程节选

So you can see that this is non-bonding, this is even worse than non-bonding, it's anti-bonding, because we're actually getting rid of electron density between the two nuclei.

所以你可以看到这是不成键的，它甚至比不成键还糟糕，它是反键，因为我们实际上是去掉了,两个原子核之间的电子。

麻省理工公开课 - 化学原理课程节选

And we need to invest in education. (Applause.) We want tomorrow's workers -- we want Arizona's workers -- to have the skills they need for the jobs like the ones that will be opening up here.

WHITEHOUSE: President Obama Speaks on an Economy Built to Last

What we're trying to do is bring people - bring the younger audiences to opera where it's not so intimidating and we - that's where we add a little twist to it.

NPR: Three Mo' Tenors Give Nod to Pavarotti

But I also remind them that if we keep showing up, which is the only thing you can do in life is wake up and keep showing up, if we keep fighting the good fight and doing in our hearts what we know is right -- see because we know what's right -- then eventually we get there, we always do.

WHITEHOUSE: Remarks by the First Lady at a Campaign Event