改进题：Simplicity of language demands, in the first place, that the texts should be colloquial rather than literary;that they should be written in short sentences, not in long and complicated clauses.

译文：语言的简单性首先要求文本是口语化的，而不是文学化的；应该用短句，而不是长而复杂的从句

改进题：Simplicity of language demands, in the first place, that the texts should be colloquial rather than literary;that they should be written in short sentences, not in long and complicated clauses.

译文：语言的简单性首先要求文本是口语化的，而不是文学化的；应该用短句，而不是长而复杂的从句。

改进的译文：为了使语言简洁，首先，文章与其使用书面体，不如使用口语体；应当用短句，而不用长的复合句。