to rock one's body backward and forward, to be convulsed
双语例句
1
这时,反射的光被照在了一个小男孩的脸上,三四个同学都去打那个同学的脸,而那群男生笑得更是前仰后俯。
At this moment, the reflected light is shining in a little boy's face, three or four students to play that the face of the classmate, and that group of boys laughed after supine before leaning more.