等级制的英文：
【法】 graded system

American grads may have more to look forward to than the average grad.
美国大学的大学毕业生可能比一般的大学毕业生更加期待实习机会。

And certainly there are undergrads as competent technically as most grad students
肯定有许多在校生在技术上是能够与绝大多数 的毕业生一较高下的。

I beg my Chinese grad students. No response.
我向我的中国研究生恳求道，但是没有反应。

And certainly there are undergrads as competent technically as most grad students.
肯定有许多在校生在技术上是能够与绝大多数的毕业生一较高下的。

Reputation of undergrad school is important for grad school admission.
本科学校的声望对于研究生院的录取来说很重要。

Is the system unstable?
是系统不稳定吗？

It was not a perfect system.
它不是一个完美的系统。

This is a sexpartite system.
这是一个由六部分组成的系统。

Anatomically, the nervous system is divided into the central nervous system and the peripheral nervous system.
解剖学上把神经组织分为中枢神经系统和周围神经系统。

disaccord between the economic system and political system
经济体制与政治体系间的不协调