参加者按年龄分组。用英语怎么说？

参加者按年龄分组。

Participants were categorized according to age.

participants

n. 参加者，参与者，参加者，参与者( participant的名词复数 )；adj. 有份的，参与的；

例句
Conference participants were clearly enthused by their presence, and the two women responded by listening intently...
她们的出席令与会者明显兴奋起来，作为回应这两位女士也专心倾听起来。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

categorized

v. 把…归类，把…列作( categorize的过去式和过去分词 )；

例句
Point data appearing on the coding forms can be categorized as follows.
编码显示的点数据,可以归纳如下.

according

adv. 依照；v. 给予( accord的现在分词 )，使和谐一致，使符合，使适合；

例句
Rocks can be classified according to their mode of origin...
可以根据岩石的成因对其进行分类。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

age

n. 年龄，时代，老年，年龄段；vt.& vi. （使）长大，使显老，使变老，使苍老；vi. [化学]老化，陈化，熟化，（吸毒者随年龄增长而主动）戒毒，戒除毒品；vt. [化学]使老化，使陈化，使熟化，估计，推测（马的年龄）；

例句
At the age of sixteen he qualified for a place at the University of Hamburg...
16岁时，他就有资格进入汉堡大学。