斯坦福大学是今年参加这次竞赛的21所美国大学中的一所。

Stanford was one of twenty-one American universities that took part in the contest this year.

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斯坦福大学是今年参加这次竞赛的21所美国大学中的一所。

Stanford was one of twenty-one American universities that took part in the contest this year.

youdao