您要查找的是不是：
- 嵌入式操作系embedded operating system
- 系system
- 院系department
- 系上to buckle up
- 系带chalaza
- 中文系department of Chinese language and literature
- 他会操作这台机器。He knows how to handle the machine.
- 菜系style of cooking
- 学会熟练地操作电脑是不容易习得的。The skilful operation of a computer is hard to learn.
- 系的phyletic
- 科系department
- 系动词copula
- 全系holophyly
- 外语系department of foreign languages
- 家系stemma
- 报系syndicate
- 色系colour system
- 数学系department of mathematics
- 计算机系computer family
- 连系copula
