上流的英文：
upper class

参考例句：

Living in genteel poverty
过穷酸的上流社会生活.

a silk - stocking district;silk - stocking prep schools.
上流社区;上流社会子弟的预科学校

He moves in very rarefied circles; his friends are all lords.
他活动于上流阶层,结交的尽是贵族。

If your fair incognita belong to the higher class of society, she must go there.
假如你那位无名美人是上流社会中的人，她也一定会到那儿去的。

Dear President Bush,I'm an ordinary Chinese woman writing you this letter in tears on my sickbed
尊敬的布什总统:我是一个普通的中国妇女，现在躺在病床上流着眼泪给您写信。

Exclusiveness is a characteristic of recent riches, high society, and the skunk.
排他主义,是为了近来的有钱人家、上流阶级以及臭鼬等的特色。

I like him and his wife; he is so ladylike, and she's such a perfect gentleman.
我喜欢他与他的太太;他是如此像个大家闺秀,而她又这么十足一位上流绅士。

Christian Lacroix is throwing a very lavish and very select party.
克里斯汀·拉克鲁瓦正在举办一个非常豪华的上流聚会。

I know I'm a common ignorant girl, and you a book-learned gentleman
我知道我只不过是个平凡的不学无术的丫头，而你是个有学问的上流绅士。

It was something new to be brought before a rebellious gentlewoman, and he did not quite know how to treat her
如今他被带来看望一位抗宗教的上流妇女，这种事他毫无经验，不知该怎么处理。

upper是什么意思：
adj. （地位）较高的；上面的，上部的
n. 鞋帮；兴奋剂

His upper arms are strong.
他的上臂很强壮。

having a flat or flattened upper surface.
有平的上表面或使上表面变平的。

I live in the upper reaches of the river.
我住在河的上游地区。

bush for rear bearing upper half
后轴承上半部轴衬

The snags incidental to a changeover in upper management.
在改变上层管理时产生的隐患

class是什么意思：
n. 班级；阶级；种类
v. 分类；把…分等级
adj. 很好的

It is a step class.
这是踏板操训练班。

The class dismissed.
下课了。

The class teacher sectioned the class for dialogues.
老师把班级分组进行对话练习。

The class teacher dismissed the class on time.
教师按时下课。

A second - class letter is slower than a first - class.
二类信比一类信件慢。