他先后教会我母语和其他语言的奥秘。
He first taught me the secrets of my own language and then those of others.
在语言交流，有两个人轮流发言，其他人的母语。
In a language exchange, two people take turns speaking the other person's native language.
在语言交流，有两个人轮流发言，其他人的母语。
In a language exchange, two people take turns speaking the other person's native language.
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