线代当然是听的李永乐的，这个毋庸置疑，讲的特别不错。
Line generation is audition Li Yongle of course, this is beyond question, those who tell is particularly pretty good.
我的全部数学资料都是海文李永乐的，因为我觉得这个老师十分认真耐心和负责。
My all maths data is sea article Li Yongle, because I feel this teacher is very serious, mix patiently responsible.
我的全部数学资料都是海文李永乐的，因为我觉得这个老师十分认真耐心和负责。
My all maths data is sea article Li Yongle, because I feel this teacher is very serious, mix patiently responsible.
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