The noun 代表团 (dàibiǎotuán) means "delegation" — a group of representatives sent to a meeting, competition, or event. It combines 代表 (representative) and 团 (group). It is commonly used in political and sporting contexts, such as 中国体育代表团 (Chinese sports delegation).
中国代表团在这次大会上发表了重要讲话。
Zhōngguó dàibiǎotuán zài zhè cì dàhuì shàng fābiǎo le zhòngyào jiǎnghuà.
The Chinese delegation delivered an important speech at this conference.
我们学校派出了一个代表团参加国际交流活动。
Wǒmen xuéxiào pàichū le yí gè dàibiǎotuán cānjiā guójì jiāoliú huódòng.
Our school sent a delegation to participate in an international exchange event.
这个代表团由十五名成员组成。
Zhège dàibiǎotuán yóu shíwǔ míng chéngyuán zǔchéng.
This delegation is composed of fifteen members.