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1·Soon the first class started.

很快，第一节课开始了。

2·The first class is Chinese.

第一节课是语文。

3·The first class is English.

第一节是英语课。

4·Just turn up for the first class.

来上第一节课就行了。

5·This is my Chinese teacher told me in the first class.

这是我的语文老师在第一节课的时候说的。

6·Running towards the school, I took a glance at my watch and found that I was already late for the first class.

我一边朝学校跑去，一边看一眼手表，发现我第一节课已经迟到了。

7·He sat quietly in the first class cabin of the flight looking tired.

他静静地坐在班机的头等舱内，看上去有些疲惫。《柯林斯英汉双解大词典》

8·The first class carriages are in front.

头等车厢在前面。《新英汉大辞典》

9·The first class begins at 7:50 am.

第一节课于7点50分开始。

10·This is the first class to be instantiated.

它是需要使用的第一个类。