The classes, which are aimed at babies aged three months to two years, are run by the Japan baby-dance association.

这些针对三个月到两周岁大的婴儿的舞蹈课程是由日本婴儿舞协会开设的。

youdao

Researchers at the American Cancer Society in Atlanta looked at the association between the waistlines of 48, 500 men and 56, 343 women aged 50 years and older, and death from any illness.

位于亚特兰大的美国癌症协会的研究人员曾探寻腰围大小与疾病致死之间的联系。 他们选取了50岁以上的48500名男性和56343名女性的作为研究对象。

youdao

Prevalent in the rural Sanchuan areas of the Minhe County, Qinghai Province, the Mani Association is a voluntary folk group mainly consisting of the middle-aged and the old people.

嘛呢会普遍存在于青海省民和县三川地区的土族村落，是农村中老年居民自愿组成的民间团体。

youdao

At primary level, last year a new sports programme was launched for primary schools where coaches from the Gaelic Athletic Association and the Irish Football Association go into schools to work with children aged four to eight.

BBC: Leap forward for school sports

It is estimated by the Fantasy Sports Trade Association that 32 million people aged twelve and above in the US and Canada played fantasy sports in 2010.

FORBES: Fantasy Football Madness

Meningiomas represent about one-third of all primary brain tumors and are most frequently found in middle-aged women, the American Brain Tumor Association's website states.

CNN: Sheryl Crow: Brain tumor is a 'bump in the road'