1. U 创作，写作，作曲　 the act of composing music, poetry, etc.
2. C 作文，作品　 an essay done as educational exercise; a piece of music or a poem
3. C U 构图；构成，成分　 the various parts from which sth is made up
4. C 混合物，合成物　 a mixture of various substances

　appreciate a ～　欣赏音乐作品
　build up a ～　组织文章的结构
　correct a ～　修改作文
　finish a ～　写完作文
　learn ～　学写作文
　make a ～　写作文，作曲
　perform a ～　演奏音乐作品
　play a ～　演奏音乐作品
　polish up a ～　给作文润色，给作文加工
　revise a ～　修改作文
　write a ～　写作文
　bad ～　糟糕的作文
　good ～　好的乐曲
　literary ～　文学作品
　long ～　写得很长的作文
　modern ～　现代乐曲
　original ～　有独创性的佳作
　short ～　短文
　business ～　商业文书
　chemical ～　化学成分
　English ～　英语作文
　music ～　乐曲谱写
　～ cloth　防水布
　subject for ～　作文题
　～ on modern science　现代科学文章

　He spent six months on the composition of the symphony.　他花了六个月时间创作这部交响乐。
　He played a piece of music of his own composition.　他演奏了一首自己创作的曲子。
　This is a good topic for composition.　这是个很好的作文题目。
　His composition is excellent except for some grammatical mistakes.　他的作文写得很好，只有几处语法错误。
　The teacher told him to cut down his composition to about 1000 words.　老师叫他把作文缩短到1000字左右。
　The teacher corrected our compositions.　老师修改了我们的作文。
　The teacher compared my composition with another student's one.　老师把我的作文与另一个同学的作文做了比较。
　You copied this composition from him, because you made exactly the same mistakes.　你这篇作文是从他那儿抄袭的，因为你也恰恰犯了相同的错误。
　The children had to write a composition about their holiday.　孩子们必须写一篇有关假期的作文。
　He discovered an accidental error in his composition.　他在作文中发现了一个意外的错误。
　You are certainly improving in your English composition.　可以肯定你的英语作文正在进步。
　Put a title at the beginning of your composition.　在你的文章开头加个标题。
　This is one of Bach's later compositions.　这是巴赫的晚年作品之一。
　Her drawing is competent, but her composition is poor.　她的画有功力，但布局欠佳。
　Have you studied the composition of the chemical?　你研究过这种药品的成分了吗?
　This is a chemical composition.　这是化学合成物。

 ♣ in composition with
　与…一并　together with sb/sth
　This point will be taken in composition with other points.　这一点将与其余各点一并考虑。
 ♣ make a composition with
　和…妥协　compromise with sb/sth
　They decided to make a composition with their rivals.　他们决定和他们的对手妥协。

 ♣ composition, theme
　这两个词都指学生的“作文”，其区别在于：theme一般指高中以上学生的作文，要求和水平都较高；而composition多用于初中以下学生，只要求组织得当，文理通顺。

　［词源］　拉丁语compositus（合成物）