A student writes what he thinks is an excellent composition, but the teacher writes no encouraging remarks.(学生写出他认为很棒的作文，但老师没有写出令人鼓舞的评语。)
They are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled.(它们的确是星云物质组成的团块，其组成物质可能与行星形成时的物质相似。)
Spectroscopy can reveal the composition of those touch-up layers too.(光谱学也可以揭示这些修饰层的组成。)
Comets are similar in composition to the gas giants.(彗星在组成上与气态巨行星相似。)
Other dimensions along which the two groups differ markedly are density and composition.(在密度和组成方面，这两个群体有显著的不同。)
There is usually a good deal of turnover in species composition, even in a mature community.(即使在一个成熟的群落中，物种组成通常也有很大的变化。)
His composition has improved.(他的作文有进步。)
Apart from [Except for] a few grammatical mistakes, this composition of yours is well written.(除了几处语法错误之外，你这篇作文写得不错。)
This composition was considered to be the very finest effort of the evening.(这篇作文被认为是当晚最出色的作品。)
Television has transformed the size and social composition of the audience at great sporting occasions.(电视改变了大型体育赛事观众的数量及其社会构成。)
