Callisthenes
n. 卡利斯提尼斯（公元前360？～前327, 希腊哲学家、历史学家）
🗣️ 情景例句
Food is necessary to maintain life.
食物是维持生命所必须的。
Why aren't you happy?
为什么无聊呢？
At night, when you really wish to go to sleep, you rarely manage to do so.
到了夜晚，你真想睡了，却很难入睡。