know for certain是什么意思?

know for certain是什么意思? for certain和certainly的区别为什么可以know for certain 而不是know certainly All i really know for certain 如题~ for certain和certainly和surelyDo you know ______that robots would like to serve human beings?A.for certain B certainly C surely for certain和certainly和surelyDo you know ______that robots would like to serve human beings?A.for certain B certainly C surely i know i was wrong i know that for certain you know we belong...give me one more chance是什么歌? for certain reason还是for a certain reason standard deduction for certain filers for certain=certainly吗? Won't it be better for me to ask you for advice on a certain problem?的中文是什么 Certain的意思是什么喔 I don't yet know that kind of personal information about you for certain.You could be deceiving me求翻译………… certain certain certain for certain 是什么意思啊详细些啊 what are the causes for certain crimes you know that certain tests are coming up