a series of和a trail of的区别

a series of和a trail of的区别 a series of 是a series of factors还是a series of reasons a series of a serious of 区别 on the right trail with a sense of disgust是什么意思重点解释一下on the right trail blaze a trail the last of a series of competitions a series a series a series a series of ,后面加什么词 a series of books翻译成中文 用a series of造句,急用! set down a series of的意思 a series of 和a pair of 后面谓语动词用单数还是复数? make a trail怎么解释? a series of与a plenty of等词的区别急!请比较a series of,a large amount of,a plenty of和a great deal of等词的区别 机场的a series of terminal units和standard module啥意思