一、句子之间缺少过渡性的单词或词组

① Salmons swim upstream, they leap over huge dams to reach their destination.

② Salmons swim upstream, and then they leap over huge dams to reach their destination.

二、省字号(')的滥用

① the government's plan

② the plan of the government

三、代词之间的性、数、格不一致

① Everyone has their homework.

② Everyone has his (or her) homework.

四、主句与从句的顺序不当

① Some of the new dot-com millionaires found out the party was over, after the NASDAQ value dropped by over two thirds.

② After the NASDAQ value dropped by over two thirds, some of the new dot-com millionaires found out the party was over.