In 1930 he lectured at the University of Michigan and in 1934 he gave a series of lectures in Brazil and Argentina.
1930年,他在密执安大学讲学。1934年,他在巴西和阿根廷作系列的讲座。
He lectured into a microphone.
他通过麦克风讲课。
He lectured on public hygiene.
他作了场关于公共卫生的讲演。
He lectured on chemistry to a class.
他给一个班上化学课。
He lectured about his method of writing.
他讲授自己的写作方法。
He lectured in the United States last year.
他去年在美国讲学。
He lectured in the United States last year.
他去年在美国讲学。
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