ect与and so on 的区别

ect与and so on 的区别

ect前面一般是一些完整的句子
and so on前面一般是一些并列的单词或词组

and so on,只能用于句末 etc.貌似也是吧， 像上面这句可以用and the like with particular emphasis，in the document，information technology, biological technology, new materials and the like in terms of high-new technology field need to take the first setp.