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1·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。

2·But the question is: smaller production capacity, variety Grade little rough, the size of suspended more PTFE resin products, resins and fine-grained less.

但存在的问题是：生产能力较小，品种牌号不多，粗、中粒度的悬浮ptfe树脂产品较多，而细粒度树脂较少。

3·I had some rough years, but finally made it to 8th grade, where I would change to a bigger school with a new teacher.

我渡过了艰苦的几年，最后到了8年级，当时我可以去一个大学校见到新老师。

4·It reduces the grade of the tea and affects the competition because of the rough packaging of China tea.

由于中国茶叶包装的简单粗糙，拉低了茶叶的档次，影响竞争力。