He felt so _sleepy__that he fell _asleep_at once.他如此困倦以至于立刻就睡着了.be sleepy网络释义be sleepy:困倦的 | 很困 | 疲倦欲睡fall asleep基本翻译v.入睡；睡着网络释义fall asleep:入睡 | 睡着 | 睡觉...