Researchers in one study in Tokyo found that more than half of junior high school students used their phones to exchange e-mails with schoolmates more than 10 times a day.
出自-2013年12月阅读原文
柯林斯高阶英汉双解学习词典释义
N-COUNT
(尤指关系要好的)同学，同窗，校友
A schoolmate is a child who goes to the same school as you, especially one who is your friend.