But Mr.Abhisit, in recent media comments, says he will not be pressed to take the country to elections at present but is willing to hold talks with protest leaders.

VOA: standard.2010.03.20

because that sarcastic undertone may or may not be present depending on how it's used.

因为话中是否有挖苦的意思，还得看这句型是如何使用的。

Do you ever课堂 - SpeakingMax英语口语达人

If the messenger RNA for protein is not present in a cell, then that can't be translated, obviously, and the protein can't be made.

如果细胞中没有,用来合成蛋白质的mRNA,那就不能进行翻译,很明显,蛋白质也不能被合成

耶鲁公开课 - 生物医学工程探索课程节选

Whereas the G20 summit in London earlier this month kept its focus on global financial and economic matters, discussions at the Summit of the Americas could be sidetracked by advocacy on behalf of a nation not present at the gathering:Cuba.

VOA: standard.2009.04.15

So can be changed slightly, depending on tense, past, present or future as well as whether or not you want to ask a question.

因此这个句型要根据不同的时态，如过去时、现在时和将来时，作出一点调整；另外也会根据是否是问句而略有不同。

There is 课堂 - SpeakingMax英语口语达人

It's not as simple as DNA going to RNA going to protein, because proteins need to be present in order to make these things happen as well.

基因表达不是简单的从DNA到RNA,再到蛋白质,因为整个过程需要,不同酶的催化作用

耶鲁公开课 - 生物医学工程探索课程节选