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profit
n.利润 vt.对......有利 vi.获利
He made a handsome profit from the sale.
他从这次买卖中得到可观的利润。
It will not profit you at all to do such a thing.
做这样的事将对你毫无益处。
A wise person profits from his mistakes.
聪明的人会从错误中获益。——谚语
muscle
n.肌肉（可数）
To tone up your muscles, you should exercise on a regular basis.
为了锻炼你的肌肉，你应该规律地运动。
flesh
n.(人)肉
Eating human flesh is considered barbarous.
吃人肉被认为很野蛮。
average
a.一般的 n.平均
The average age of my students is fifteen.
我的学生平均年龄是15岁。
On average, we work five hours overtime each week.
平均而言，我们一星期加班5小时。
Most students in this class are of average intelligence.
这班级大部分学生的智力都很平常。
The workaholic works an average of 16 hours a day. The workaholic works 16 hours a day on average.
这个工作狂每天平均工作16小时。
dust
n.灰尘 vt.除去……的灰尘
There is so much dust on the table.
桌上有很多灰尘。
I used a feather duster to dust the table.
我用鸡毛掸子把桌上的灰尘掸掉。
dirt
n.泥土；脏东西；灰尘
I'm afraid your sneakers need to be washed because they're covered with dirt.
你的球鞋都是泥巴，恐怕得洗了。
author
n.(某本书或文章的）作者
The author of the novel is a very famous writer.
这本小说的作者是位很有名的作家。
automobile
n.汽车
I can't afford a brand-new automobile, so I'm going to buy a used one.
我买不起全新的汽车，因此我打算要买一台二手的。
vehicle
n.车辆；任何有轮子的运载工具
The number of motor vehicles on the roads rose by 30% last year.
去年道路车辆的数量成长了 30%。
headquarters
n.总部（单复数同形；缩写为HQ)
Gangsters surrounded the police headquarters last night.
帮派分子昨晚包围警备总部。
