rough inclusion calculus Rough包含运算
After experiencing a particularly rough time in a calculus class during his sophomore year at UCLA, Mike Moradian began to think students could benefit from knowing more about how professors grade.
在加利福尼亚大学洛杉矶分校(ucla)二年级学习微积分课程时，Moradian经历了一段特别痛苦的时间。在那之后Mike Moradian就想：如果学生们对教授本人的评级了解的越多，那么他们一定会从中受益。
The hard, rough stains are calculus.
又粗又硬的着色的地方就是齿石。
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