【正确答案】：
IDIOMS CONSIST OF SET PHRASES AND SHORT SENTENCES, WHICH ARE PECULIAR TO THE LANGUAGE IN QUESTION AND LOADED WITH THE NATIVE CULTURES AND IDEAS.
【题目解析】：Idioms consist of set phrases and short sentences, which are peculiar to the language in question and loaded with the native cultures and ideas.习语由固定词组和短句组成，这是语言中所特有的，并承载着本土文化和思想。