请将以下段落总结为一句话，核心信息是参加班级求婚的同学声音大小不一。 Homo sapiens are the extant human species, and some of them were at the class where one individual proposed to their partner in a small gathering; the volume of voices among the classmates varied significantly, some were nearly silent and others were shouting gleefully.
user
参加班级求婚的同学中，声音大小差异显著，有的几乎听不见，有的则欣喜若狂地大声叫喊。
assistant