有一个指数委员会在新公司发展壮大的时候，一直持续替换新股，他们希望在美国，用500指数来反映，世界上大部分的公司。

There's an index committee that keeps bringing in new shares when new companies become important; they try to get the 500 representative of the most companies in the world — in the U.S..

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There's an index committee that keeps bringing in new shares when new companies become important; they try to get the 500 representative of the most companies in the world--in the U.S.

有一个指数委员会在新公司发展壮大的时候,一直持续替换新股,他们希望在美国,用500指数来反映,世界上大部分的公司

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