Preliminary phase one tests of this new type of flu vaccine have already started in humans, but in an interview, Nabel said that even if all goes well, it will still be years before a universal flu vaccine is widely available.

VOA: standard.2010.07.21

Well the power points will be available before, say for this lecture it will be before so that you can use them in class.

幻灯片其实课前就能下载，这样你上课时就能用到。

哈佛公开课 - 幸福课课程节选

The United States is seeking assurances from Mr.Netanyahu that such an incident will not be repeated, as well as pledges that it is prepared to discuss all of the core issues of the Middle East peace process - including Jerusalem - in talks with the Palestinians.

VOA: standard.2010.03.16