They repaired an existing infrared wavelength camera and spectrometer.

VOA: special.2009.09.30

The end result is you can design now very specific double stranded RNA sequences, that when delivered into cells again will activate this process of natural degradation of an existing messenger RNA.

最终的结果是,你现在能够设计针对性很强的,双链RNA序列,当这段序列被转入细胞后会激活,对已有信使RNA进行降解的过程

耶鲁公开课 - 生物医学工程探索课程节选

We know this. Milton has already indulged this fantasy of coming before something that's already happened. We recognize this desire to anticipate an already existing narrative, from what?

我们知道，弥尔顿先前就有让自己先于,已经发生的事情的渴望，这种参与到,已经发生的事情中的渴望可以从？

耶鲁公开课 - 弥尔顿课程节选

It may make an existing health problem worse.

VOA: special.2009.03.24

closing an air field in a populated area and building a new one on an existing U.S.base in the northern part of the island.

VOA: standard.2009.10.20

Recently,Japan announced it would provide $5 billion over five years in additional aid to Afghanistan, and would move swiftly to fulfill an existing pledge of $1 billion in economic assistance to Pakistan.

VOA: standard.2009.11.12

The government will use as much as $100 billion from an existing fund set up to rescue the ailing financial sector to provide guarantees and low interest loans to those willing to purchase these assets.

VOA: standard.2009.03.23

Some gardeners prepare an area by removing the existing top soil and grass.

VOA: special.2009.07.07

Still another involves using an herbicide chemical to kill the existing grass.

VOA: special.2009.07.07

That said,we're still not going anywhere fast." Despite an $8,000 tax incentive for first time home buyers, sales of existing homes have declined two months in a row.

VOA: standard.2010.03.02

Erin Jansen,founder of Netlingo, an online dictionary of Internet and text messaging terms, also says the new technology has not fundamentally changed existing language but added immensely to the vocabulary.

VOA: standard.2010.01.16

In the face of opposition from Independent Senator Joe Lieberman, and to gain his vote, Senate lawmakers first dropped the government insurance option and then an alternative plan to decrease the eligibility age for the existing government Medicare program.

VOA: standard.2009.12.25