可以:
That was the very reason why he felt a certain bitterness.
Leaflets have been air dropped telling people to leave certain areas.
He has been doing this for a certain period of time.
There will be certain people who'll say 'I told you so!'
I received a certain amount of sympathy immediately after the attack.
追问问您啊～有道字典上没有查到certain有某些的意思…到底有没有呢…
追答看这个，好好用的：
http://www.iciba.com/certain
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