Usually free radical has better activity and shorter half life, hence there have many methods for us to study free radical.

由于自由基活性高、 半衰期短，其研究方法呈现多样化的特点。

youdao

Once you enter the university, you will be free to study whatever interests you.

一旦你进入大学，你可以自由学习任何你感兴趣的东西。

youdao

Isadora Duncan did study ballet briefly as a child, but she quickly developed her own unique style, which she called free dance.

伊莎多拉·邓肯小时候曾短时间学习过芭蕾舞，但她很快就发展出了自己独特的风格，她称之为自由舞蹈。

youdao

The University of Nottingham study examined whether the possibility of punishing free-riders leads to better group results.

VOA: special.2009.03.03

ve something like, recent study shows of 30,000 Canadians have gone for other countries for health treatments, even though they got it free of charge in Canada, ve get to pay for it somewhere else, and they go.

有大约，You’,最近调查显示是3万加拿大人,去别的国家,寻求医疗，即使在加拿大有免费的，他们在别处得付费，and，they’,他们还是选择出去。

斯坦福公开课 - 经济学课程节选

A new study has found the strongest evidence yet that smoke-free laws can reduce a major effect of tobacco smoking - heart disease.

VOA: special.2009.01.07

Mr. Boudreaux is professor of economics at George Mason University and chair for the study of free market capitalism at the Mercatus Center.

WSJ: Donald Boudreaux and Mark Perry: The Myth of a Stagnant Middle Class

The complete study is available free to CEA member companies at members.

ENGADGET: Shocker: CEA's spending report finds Americans buying more technology

It is hoped the qualification - currently with the exams regulator, Ofqual, for approval - will be rolled out in secondary schools in the UK from next year, possibly as part of PSHE (personal, social and health education) or free study periods.

BBC: Boys suffer poor body image, say teachers