International Circulation: Professor Hu, how about your experience here at AHA 2009, can you talk about some sessions that you thought were very informative or very useful as a Chinese cardiologist?

《国际循环》：胡教授，您对AHA 2009的体验如何，作为中国的心血管专家，您认为哪些会议内容更丰富，或有实用价值？

youdao

The little notebooks are also very useful for copying or summarizing something one has read.

这个小记事本在抄写和总结人们读过的东西是也是十分有用的。

youdao

About 80 percent of the fusion energy released is in the form of those neutrons, so the reaction isn't very healthy (or useful) for a starship.

大约80百分之的聚变能以中子的形式释放出来，所以这个核反应不是很大（或有用）对于一个星际飞船。

youdao

You'll find "That's all" very useful to express what you have or to put a stop to something.

你会发现 “That's all” 是个非常有用的句型。你可以用它来给一件事画个句号。

That's all课堂 - SpeakingMax英语口语达人

"It doesn't matter if you fix the knee if the rest of your life isn't very productive or useful, " said Dr. Nadler.

WSJ: NFL Players Fund $100 Million Health Study at Harvard

It is just not very convincing, or useful.

ECONOMIST: Letters | The

Avoid all mutual funds except for asset allocators (balanced funds or go-anywhere can be very useful for investors).

FORBES: Don't Blow Up: 20 Rules for Individual Investors