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

　　一個國(guo)家(jia)不同區域的(de)(de)森林在組成結(jie)構上(shang)存(cun)在很(hen)大的(de)(de)差異。

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

　　電(dian)視改變了重(zhong)大體育賽(sai)事觀眾(zhong)的規模和其社會階層構成結構。

　　He taught the piano, organ and composition

　　他教授(shou)鋼(gang)琴、管風琴和作曲。

　　He handed his composition to the teacher.

　　他把(ba)作文交(jiao)給了老(lao)師。

　　Please shorten your composition.

　　請壓縮一下(xia)你的作(zuo)文。