It's just this kind of threshold that causes many students to study late into the night, only to get up and go to class the next morning. It also causes many schools to add extra classes, including make-up classes, and to cancel holidays and days off.
Outside the curtain rain babbles, Spring is wearing off, Silk bedding cannot fend off the fifth-watch chill, Lost in dreamland I know not myself as a guest, Indulging in pleasure for the moment.