在课堂上，她先复习了步骤，然后把我们分成两组做实验。
During the class, she first went over the steps and then put us into groups of two to do the experiments.
我们分成两组；每组五个学生。
We divided into two groups; there were five students in each group.
首先，我们分成两组参赛，第一组马上开始比赛了，所有人都开始为自己班级喝彩。
We divided into two groups. The first group is started to play. All the students were shouting. The girls screamed and cheered.
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