Last semester I took an archaeology class and we spent a lot of time studying ways to date things.
上学期我上了一门考古学的课，在这门课上我们花了很多时间来研究确定物件日期的方法。
For those who want to try, you probably could pass this class and maybe even get an okay grade without doing the readings.
对于那些想要尝试的人，你可能会通过这门课，甚至不需要阅读就可能得到一个不错的分数。
You can also take an online class and try tai chi at home.
你也可以参加在线课程，在家里尝试太极。
A teacher gave her class an interesting task—to draw a picture of something to express their thanks.
一位老师给她的学生们布置了一项有趣的任务——画一幅图来表达他们的感谢。
China's massive size makes its growing middle class an important part of the global economy.
中国庞大的人口规模使其不断壮大的中产阶级成为全球经济的一个重要组成部分。
There's no special interface that needs to be implemented to make a class an aspect, but specific method signatures are required to access the class as an aspect.
让一个类成为aspect不需要实现特殊的接口，但是需要特定的方法签名以使类作为一个aspect被访问。
I'd like to join an aerobics class to improve my fitness.
我想进一个有氧运动班来增强我的体质。
On Tuesday afternoons we have an informal singing class, which most of the residents attend.
星期二下午我们有一个非正式的歌唱班，大多数居民都参加了。
Pessen does present a quantity of examples, together with some refreshingly intelligible statistics, to establish the existence of an inordinately wealthy class.
佩森确实提出了大量的例子，以及一些令人耳目一新的、易于理解的统计数据，来证明一个异常富有阶级的存在。
The entertainment department of our Student Union organizes an activity in which each class shoots a short movie.
我们学生会的娱乐部组织了一次活动，每个班级要为此拍摄一部短片。
Julia Silverman and Jessica Matthews developed the sOccket as part of a group project for an engineering class at Harvard University.
JuliaSilverman和JessicaMatthews开发了sOccket，这是哈佛大学工程课小组项目的一部分。
States had at least three social levels, usually, an upper class of rulers, a middleclass comprised of managers and merchants, and a lower class of crop producers and agricultural laborers.
国家中至少有三种社会阶层，上层阶级（执政），中产阶级（商人，管理者）和下层阶级（农民，工人）。
Normally, you wouldn't tackle Joyce in an Intro class, but I'd like to give my first year students a taste of his style, his psychological approach to literature.
一般来说，入门课上不会研究乔伊斯，但我想让我一年级的学生粗识他的风格，以及他在文学阐释中采用的心理学路径。
To enter Class B airspace, such as an approach to a major metropolitan airport, an explicit ATC clearance is required.
需要持有明确的空中交通管制许可才能进入B类空域，如接近一个大都会机场。
I've joined an aerobics class.
我参加了有氧健身班。
The dancing is uninhibited and as frenzied as an aerobics class.
跳舞都放开了，像健身课那样尽情。
Angela says she longs to join an amateur dramatics class.
安吉拉说她渴望参加业余戏剧班。
Acting was not a kosher trade for an upper-class girl.
那时演戏对出身上流社会的女孩儿来说不是一个合适的职业。
"I still grew up in an upper middle-class home with parents who didn't have college degrees," Schneider said.
施耐德说道：“我的父母没有大学文凭，但我仍然成长于一个上层中产阶级的家庭。”
This is a really good topic to do with the class before an exam because it's a little bit of a lighter topic.
这对于考试之前的一节课来说是一个非常好的课题，因为这是一个稍微轻松一点的课题。
The following term, I decided to be a member of an ASL class.
接下来的学期，我决定成为美国手语班的一员。
Students are encouraged by their teachers to take an active part in class discussions.
老师鼓励学生积极参与课堂讨论。
With an increasingly large class, it is impossible for most teachers to give students meaningful feedback on writing assignments, he said.
他说，随着班级规模越来越大，大多数老师无法就学生的写作作业给出有意义的反馈。
When the work was completed, many moved to other construction jobs or to factory work in cities and towns, where they became part of an expanding working class.
工程完工后，许多人转到其他建筑工地或城镇的工厂工作，在那里他们成为不断扩大的工人阶级的一部分。
As a member of the middle class, Gaskell could hardly help approaching working-class life as an outside observer and a reporter, and the reader of the novel is always conscious of this fact.
作为中产阶级的一员，Gaskell不得不以旁观者和记者的身份接近工人阶级的生活，而小说的读者也总是意识到这一点。
To measure the effects of Internet-based distractions during class, researchers evaluated 500 students taking an introductory psychology class at Michigan State University.
为了衡量上课期间上网对学生注意力分散的影响，研究人员对密歇根州立大学修读心理学入门课程的500名学生进行了评估。
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