I'm not convinced he's on the level.
我不相信他是真誠的。
He convinced me he was right.
他使我相信他是正確的。
I'm still not totally convinced that he knows what he's doing.
我仍然不完全相信他明白自己在干什么。
I am not altogether convinced by this argument.
我不完全信服這一論據。
I'm convinced there's a jinx on this car.
我看這輛汽車是災星。