fall among偶然遇到(壞人等); 偶然陷入…之中

　　例：He fell among thieves and was stripped.他遇到竊賊,所有東西都被搶走。

　　all apart 散開,崩潰,破碎

　　例：Feudalism was falling apart.封建制度正在土崩瓦解。

　　fall back 后退,(對(duì)方因被擊敗而)退卻

　　例：The crowd fell back to let the doctor through.人群退后讓醫(yī)生走過去