Exercise can keep you happy.

锻炼可以让你快乐。

youdao

Friends keep you happy, which helps keep you healthy.

好友让你保持好心情，好心情让你保持好身体。

youdao

Mmm... I'll just have to make sure to keep you happy.

嗯…我只想要确保让你开心。

youdao

It will keep you happy with your business.

FORBES: 3 Steps to a More Honest Business

You don't have what it will take to keep her happy, and you will get dumped at the most inconvenient time.

FORBES: Magazine Article

If you're happy with your plan, you keep it.

NPR: Obama Pitches Health Care Overhaul In Wisconsin