A small amount is present as myoglobin, which ACTS as an oxygen store in muscle tissue.

少量存在的肌红蛋白，它作为一个氧气储存在肌肉组织。

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Haem iron only exists in animal tissues, whilst in plant foods iron is present as non-haem iron.

血红素铁只存在于动物组织，而在植物性食品铁本作为非血红素铁。

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How you present the content in a test essay is as important as what you know.

在一个论文测验中，你怎么介绍论文的内容与你知道些什么一样重要。

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She says her goal as an artist is to present a pop record to the world in a very interesting way.

VOA: special.2009.02.27

Now the nice thing about this is that the degradation mechanisms seem to persist for some period of time, beyond the time at which you deliver the double stranded RNA; whereas, obviously, this mechanism here is only going to exist for as long as the anti-sense sequence is present.

而好消息是降解过程会持续一段时间,比你转入双链RNA的时间要长,但是,这种机制只会在,有反义链的时候发挥作用

耶鲁公开课 - 生物医学工程探索课程节选

"Anytime you have a high-profile case, as this one is,concerns about a fair and impartial jury will be present in any defense counsel's mind."

VOA: standard.2009.11.10

In the book, Reid is referring to the idea of internet radio, but the idea is as present today as ever.

FORBES: Shooting the Proscenium Arch: How People Fail to Realize Technology's Potential

If this is present, as it is in many European countries, then recessions can have a permanent cost.

ECONOMIST: Should we learn to love recessions?

This is especially true in an international environment that is as unpredictable as the present one.

CENTERFORSECURITYPOLICY: Critical Mass: Getting the Bush Nuclear Review Right