be useful for=什么?
be useful for=什么?
be useful to和be useful for的区别
是be useful for 还是be useful to?
be useful to和be useful for的区别?
请问be useful for sb是不是短语
be useful for sb.对…有好处; be useful to sb.对某人有用;
be useful是什么意思
be more useful是什么意思
this article is suppose to be most useful for those who want
they will be more useful than what is common for early proto
英语翻译For genetic markers to be useful in gene mapping studies
Some men seek office,not to be useful to the state,but for t