y What's xB compared to yB of this point up here?

是多少？，What’s，y？,在这个特殊点，xB和yB有何不同？

youdao

y What's xB compared to yB of this point up here?

是多少？，What’s，y？,在这个特殊点，xB和yB有何不同？

youdao