n.系统，制度

　　You'll have to learn the operating system before you can use this machine.

　　使用机器前，你要先学习它的操作系统。

　　Few parents are in favor of the recent changes to the education system.

　　赞成最近教育制度改革的家长寥寥可数。

　　systematic

　　a.有系统的

　　In an assembly line, everything must be done in a systematic way.

　　在生产线上，一切都必须以有系统的方式作业。

　　program

　　n.节目；（电脑）程序 vt.为（电脑）设计程序

　　What kind of TV programs do you enjoy watching?

　　你喜欢看哪一种电视节目？

　　The program wasn't working, so I had to restart the computer.

　　这个程序无效，因此我得将电脑重新开机。

　　These computers have been programmed to run the tests once turned on.

　　这些电脑程序已经被设计成一开机这些测试就能启动。

　　programmer

　　n.程序设计师

　　Job vacancies for programmers are currently not available.

　　我们目前不缺程序设计师。

　　unite

　　vt.使联合 vi.团结

　　Our goal is to unite the labor unions to oppose the new policy.

　　我们的目标是联合这些劳工团体反对这项新政策。

　　We should unite, or we'll be defeated by the enemy.

　　我们要团结，否则会被敌人击溃。

　　unity

　　n.一致；团结(不可数)

　　The plot of the drama lacks unity.

　　这出戏的剧情缺乏一致性。

　　The political party lost the election due to lack of unity.

　　该政党选举失败是因为不团结。

　　union

　　n.工会；联合

　　The union decided to go on strike due to the low wages.

　　由于薪资偏低，因此该工会决定罢工。

　　This car is a perfect union of beauty and technology.

　　这辆车子是美与科技的完美结合。

　　reunion

　　n.重聚，团圆

　　Our high school reunion is next Tuesday.

　　我们高中同学会在下星期二。

　　remain

　　vi.继续存在；仍保持是（之后接名词或形容词作表语）

　　No one remained in the hall soon after the concert was over.

　　音乐会结束没多久，大厅里一个人影都不剩了。

　　It remains to be seen which team will win.

　　哪一队会赢尚有待观察。

　　Though divorced, Anna and David still remain friends.

　　虽然离婚了，安娜和大卫仍是朋友。

　　The problem still remains unsolved.

　　这个问题仍然一直没有解决。

　　remains

　　n.遗迹（恒用复数形）

　　The remains are the most famous tourist attraction in the country.

　　这些遗迹是该国境内最有名的旅游景点。