I feel a bit doped up, but I'm okay.

我觉得有点飘，不过没事。

《柯林斯英汉双解大词典》

They think they're okay because they can get by on 6.5 hours, when they really need 7.5, eight, or even more to feel ideally vigorous.

他们认为自己的状态还可以，因为他们可以睡六个半小时来过活，即使实际上，他们需要七个半小时、八个小时甚至更长的时间，才能达到精力充沛的状态。

youdao

Okay, maybe I feel this way a little bit given my opening paragraph.

好吧，我认为也许我在开头的一段中已经做出了一些说明。

youdao

It's the greatest learning curve about this game - as soon as you feel you're doing okay it gets up and smacks you on the backside.

BBC: Ponting determined to bounce back

When I'm really on a roll if I'm not too tired - and that does gives you kind of energy when you feel like, okay, I'm in a groove now and I'm going in the right direction.

NPR: Grigsby Bates on Her New Mystery Novel

After you crank it on (okay, there's no cranking involved -- just a button press), you'll feel it kick in after maybe five seconds.

ENGADGET: Schwinn Tailwind electric bike review