李永乐

李永乐 (Li Yong Le), is a high school science and math teacher, who has some of the most elegantly presented content about math and science in Chinese language. He as a Youtube Channel, called: 李永乐老师.

Content related to 李永乐:

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Video/100⁹⁹和99¹⁰⁰哪个大？谷爱凌在中国上10天课，能顶美国上一年