certain基本解释
adj,某一；必然的；确信；无疑的；有把握的,同近
I felt certain that I’d passed the test..我感觉自己肯定通过这次测验了。
某一；必然的；确信；无疑的；有把握的英释adjadjconfident and sure, without any doubts
a certain extent,一定程度上.短语
