Still,Mr.Obama's critics say his trip to China will be a test of whether the U.S and China can develop better ties, and whether American acquiescence on some issues will produce concrete results on others.

VOA: standard.2009.11.10

So, again, all together, this is the basis for modern chemistry, and examples I just gave you, are some of the things that modern chemists are working on -- some of the issues that our country faces and our world faces, and how chemistry is involved in that.

所以说,所有的这些就是现代化学最基本的基础，我刚给你们介绍的例子,都是现代化学正在研究的东西,一些我们国家和全世界面临的问题，以及它们和化学的关系。

麻省理工公开课 - 化学原理课程节选

So, by thinking about it, by thinking about these kinds of issues, we can see that the mind has some kind of handle on these perfect, well, we need a word.

所以,通过思考这个问题,通过思考以上那些问题,我们可以知道,心灵可以一定程度上理解完美,我需要一个词

耶鲁公开课 - 死亡课程节选

Some are philosophically based. Some do work for the government on government contracts addressing particular issues.

VOA: special.2010.09.27

"I think it's fair to say that the American people are frustrated with the lack of progress on some key issues."

VOA: standard.2010.02.09

"There remain concerns to some on the wider issues of the Lockerbie atrocity,"

VOA: standard.2009.08.24

Clinton said it is "old thinking" to argue that because Washington and Moscow differ on some regional issues, including Georgia, they should not try to address matters of "overwhelming importance" like arms control.

VOA: standard.2009.05.07

Clinton said the two countries, which had frosty relations during the Cold War era and beyond, still differ on some key issues but that their new partnership has the potential to be a "signature accomplishment" of the two governments.

VOA: standard.2009.07.20

He says the Obama administration's "It's a presumption that these are obstacles to cooperation, which in fact I think China has enough of their own interests and equities in for example the economic situation to cooperate irrespective of what we do on some of these other issues,".

VOA: standard.2009.11.10