He studied economics at Yale.
他曾在耶鲁大学学习经济学。
英语解释：the study of how a society organizes its money, trade and industry 经济学:
注：一词多义，单词一次只记一种意思即可。
,
He studied economics at Yale.
他曾在耶鲁大学学习经济学。
英语解释：the study of how a society organizes its money, trade and industry 经济学:
注：一词多义，单词一次只记一种意思即可。
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