look a gift horse in the mouth

v.

对礼物吹毛求疵；

Look a Gift Horse in the Mouth
Look a Gift Horse In the Mouth
Look a gift horse in the mouth
Pharmaceutical patient assistance programs: don't look a gift horse in the mouth or there's no such thing as a free lunch
Increasing Payments in Crowdsourcing: Don't Look a Gift Horse in the Mouth!
How to look a gift horse in the mouth, or how to tell people you can't use their old junk in your library
When to look a gift horse in the mouth
Never look a gift horse in the mouth or should you? Upgrading the Hare Irrigation System in Southern Ethiopia
Don't look a gift horse in the mouth: When the data you receive is not the data you want
‘Don’t look a gift horse in the mouth’: regulating for integrity, what equestrianism can learn from Thoroughbred racing