u发音不相同: / ʌ /，/ ju: / They run a small grocery store.
他们经营一家小食品杂货店。
When I give the signal ， run!
我一发信号，你就跑！
She took the stairs at a run.
她跑着上了楼梯。No student is to leave the room.
学生一律不许离开这房间。
I was always hard up as a student.
我当学生时总是很拮据。
She's a student at Sussex University.
她是萨塞克斯大学的学生。
Student numbers are expanding rapidly.
学生人数在迅速增加。
