At the beginning of the file a basic class is defined with four properties.
在文件的开始，一个基础类定义了4个属性。
At the beginning of the class, the teacher tells us a funny story.
在上课的开始，老师给我们讲了一个有趣的故事。
She sang a song for us at the beginning of class.
上课开始时她为我们唱了一支歌。
This week in class, we are beginning a new Unit, Unit 6.
本周的课上我们开始了一个新单元，第六单元。
This week in class, we are beginning a new Unit, Unit 6.
本周的课上我们开始了一个新单元，第六单元。
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