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machinery
n.机器（集合名词，不可数）
They purchased new machinery for the factory.
他们为这工厂添购新的机器。
The general manager believes that more machinery/ machines should be bought to increase productivity.
总经理认为应该买进更多机器来增加产值。
mechanical
a.机械的；机械性的
My brother is studying mechanical engineering in college.
我哥哥目前在大学念机械工程。
The flight was canceled due to mechanical problems.
航班因为机械问题而取消。
mechanic
n.技工，机械师
The factory now has two job vacancies for auto mechanics.
这间工厂现在有两个汽车技师的职缺。
witness
n.证人；证明 vt.目击
Tom is the only witness to the murder.
汤姆是凶杀案唯一的证人。
John's success bears witness to his hard work over the past 10 years.
约翰的成功为他10年来的努力作了见证。
Did you witness the murder yourself?
你亲眼目睹了这桩凶杀案吗？
prime
a.主要的；最好的 n.精华部分
The investigators are still unable to find the prime cause of that plane crash.
调査人员仍找不出那起飞机失事的主因。
Matthew once played a part in the prime time television series.
马修曾在黄金时段电视影集中担任一角。
Mr. Clinton was a very successful businessman in his Prime.=Mr. Clinton was a very successful businessman in the prime of life.
克林顿先生壮年时期是个非常成功的生意人。
dominant
a.支配的；重要的（职位）
I don't like John because of his dominant personality.
约翰老爱支使别人的这种性格让我很不喜欢他。
John holds a dominant position in our company.
约翰在我们公司的职位很高。
dominate
vi.统治，支配；俯瞰（指山脉或建筑物）
The strong animal dominated the weak animal.
这只强壮的动物支配那只弱小的动物。
The big mountain dominates the landscape.
这座大山俯瞰四周的景色。
The house on the hilltop dominates the whole valley.=The house on the hilltop overlooks the whole valley.
山丘上的这间房子可俯瞰整座山谷。
satisfaction
n.满足，满意
The success of the experiment gave the scientist a sense of satisfaction.
这项实验的成功带给这位科学家满足感。
To the teacher's satisfaction, all her students have done their homework.
令老师满意的是，所有学生都写了作业。
dissatisfaction
n.不满，不平
All employees expressed great dissatisfaction with the company's new rules.
所有员工都对公司的新规定表达强烈不满。
A good leader should always pay attention to any signs of dissatisfaction.
好的领导者要能随时注意任何不满的征兆。
interpret
vt.翻译，口译；解释，视为
Mr. Lee interpreted the words of the French speaker for the American audience.
李先生为美国观众口译这位法国演说者的话。
I interpreted Ray's silence as acceptance.
我把小雷的沉默视为接受。
