"买花了吗" in Engpsh can be translated as "Did you buy flowers?", or more colloquially as "Did you get flowers?".

This phrase is asking whether the person being addressed has already purchased flowers. It is a common question that someone might ask if they are planning on buying flowers and want to know if someone else has already taken care of it.

Here are some example sentences in Engpsh with their translations:

"Did you buy flowers for the party?" (你买花了吗？)
"I was thinking of getting flowers for Mother's Day, but did you already buy some?" (我本来想买花给妈妈的，但是你买了吗？)
"No, I didn't buy flowers yet. Do you want to go get some together?" (没有，我还没买花。你想不想一起去买？)

Note that in Engpsh, the word "buy" is often used in place of "purchase" in colloquial speech. "Purchase" is a more formal word, and may be used in more formal situations or in written Engpsh.