s. definite but not specified or identified
a. having or feeling no doubt or uncertainty; confident and assured
a. established beyond doubt or question; definitely known
a. certain to occur; destined or inevitable
a. 确定的, 某一个的, 必然的
[法] 确凿的, 无疑的, 可靠的
1. I am certain that I left my keys on the table.
我确定我的钥匙留在桌子上了。
2. She has a certain talent for singing.
她有一种特定的唱歌天赋。
3. Are you certain about your decision?
你对你的决定确定吗？