U代表不可数,C可数,不同含义可不可数不同,作作文来说可数
1. 写作;作曲[U]
The composition of the report took two months.
写这份报告花了两个月时间。
2. 作品;作文;(大型)乐曲[C]
There are many spelling mistakes in your compositions.
你的作文有许多拼写错误。
3. 构成;构图;成分[C][U]
We examined the rock to find out its composition.
我们检验了这一石块,想弄清它的构成成分。
4. 气质,脾性[U]
He has a touch of stubbornness in his composition.
他脾气有点倔。
5. 合成物,仿造物[C]
a chemical composition
化合物
6. 【印】排字[U]
7. 和解协议[C]
make a composition with one's creditors
和债主达成和解协议
当作 作品;作文; 是可数名词