1.composition的意思是“作曲,创作,写作”,表示抽象的行为,是不可数名词。引申可表示具体的成果,即“作文,作品”,是可数名词。
2.composition也可作“构成,成分”解,既可作可数名词,又可作不可数名词。
3.composition还有“混合物,合成物”的意思,是可数名词。

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。

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。

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)