Doesn't grow on trees means that a substance is valuable. It must be earned and does not come easy.
an idiom is a saying that doesnt mean what it says. and example is someone saying the apple doesnt fall far from the tree, the are not actually talking about apples and trees they are usually talking about a parent and child relationship.
Does it mean what it seems to mean? That is how you tell.Let's look at it - "Once a man, twice a child" would mean that you are a child twice, and a man once - or, you are childish, then you grow up, then you grow old and become childish again.So it's not an idiom because an idiom would not make sense unless you knew exactly what it meant. It must be a proverb.
This is not an idiom. It means just what it seems to mean. It's a proverb. And it's also a sentence already.
it could mean that ther will be a flood or 2 trees grow in a nearby lake
This idiom means that he doesnt have a particular destination. Also, that he is open to any adventure where ever or when ever.
It means you are hallucinating as acorns grow on Oak trees.
It means that you have to work for money, it's not easy to come by. People will say money doesn't grow on trees, because typically trees are abundant, and the things that grow on trees are easy to get. You have to work for true money.
I have no idea what you mean by grow. There are several meanings for grow you know. If you mean grow trees, it should be "种植"(zhòng zhí);if you mean grow up, it should be "成长" (chéng zhǎng).
RFP is not an idiom. It's an abbreviation.
It's not really an idiom. It means "what are you thinking about."
It is not an idiom, it means your nose is itching.
It's a place where they grow decorative trees, a bit like a greenhouse .