The boy students are a little more than the girl students, but in classes of most schools, the proportion of the two genders is basically balanced.

男生数目比女生数目要稍多一些，但是在大多数学校的班级中，两性比例基本是平衡的。

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Two years ago, only 15 percent of boy students smoked, while now 55 percent of them smoke as well as some girl students.

规劝学生们为保持身体健康而戒烟。1。两年前，仅有15%的男生吸烟；如今吸烟者已达55%，甚至有些女生也吸烟。

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