单词：certain of
确信…
certain of的用法和样例：
例句
- The story convinced everyone of his innocence.这一番话使大家确信他是无辜的。
- I am certain that I posted the letter.我确信我寄出了那封信。
词汇搭配
- make certain of确定(弄清楚...
- lady of a certain age半老徐娘
- of a certain age不算年轻了,中年的...