三学期制用英文怎么说

8次大中小

三学期制的英文：
trimester system

trimester是什么意思：
n. 三个月,学期

Some women experience morning sickness during the first trimester of pregnancy.
有些妇女在怀孕的头三个月里,早上有恶心感。

system是什么意思：
n. 体系，系统；设备；制度；方法；身体；次序

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