打算6级再刷一下分（ 🫪） 
刚好看到个博主3b1b 
佬们可以去刷一刷 
主观感觉声音讲得比较清楚 
也刚好可以补一些薄弱得可怜的数学基础 

 [PixPin] 

My name is Grant Sanderson. Videos here cover a variety of topics in math, or adjacent fields like physics and CS, all with an emphasis on visualizing the core ideas. The goal is to use animation to help elucidate and motivate otherwise tricky topics, and for difficult problems to be made simple with changes in pe...