Kasparov became world champion.是什么意思？

Kasparov became world champion.

卡斯帕罗夫成为世界冠军。

Kasparov

例句
Gary Kasparov has retained his title as world chess champion.
加雷·卡斯帕罗夫卫冕了他国际象棋世界冠军的称号。

became

v. 变为，成为（ become的过去式 ）；

例句
It became very clear that the incident was not just an aberration, it was not just a single incident.
事实已经很清楚，这件事不是偶发的，它并不是一起孤立的事件。

world

n. 世界，地球，领域，尘世；

例句
Rosie's idyllic world came to an abrupt end when her parents' marriage broke up...
父母婚姻的破裂使得罗茜田园诗般美好的世界陡然画上了句号。

champion

n. 冠军，捍卫者，拥护者，战士；vt. 为…而斗争，捍卫，声援；adj. 优胜的，第一流的；

例句
He has been seen as a champion of a more cautious approach to economic reform.
人们一直将他视为主张更为谨慎的经济改革措施的提倡者。