可调角度器:kind of和kinds of

kind of和kinds of kinds of\kind of\a kind of在句子中的使用 investgation of all kinds of a kind和on a kind分别是什么意思啊? Trees are of many kinds. kind of pag a kind of food_______ 谁能告诉我kind of 与 a kind of 的联系和区别啊？谢谢啦！~ The five kinds of simple sentences. We Hate All Kinds Of Violence