Forests vary greatly in composition from one part of the country to another.

　　一個國家不同區域的森林在組成結構上存在很大的差異。

　　Television has transformed the size and social composition of the audience at great sporting occasions

　　電視改變了重大體育賽事觀眾的規模和其社會階層構成結構。

　　He taught the piano, organ and composition

　　他教授鋼琴、管風琴和作曲。

　　He handed his composition to the teacher.

　　他把作文交給了老師。

　　Please shorten your composition.

　　請壓縮一下你的作文。