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

　　一個國家不同區(qū)域的森林在組成結(jié)構(gòu)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(guī)模和其社會階層構(gòu)成結(jié)構(gòu)。

　　He taught the piano, organ and composition

　　他教授鋼琴、管風(fēng)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。