【正确答案】：
IT SHOULD BE POINTED OUT THAT THE IDIOMATICITY OF IDIOMS IS GRADABLE AND MAY BEST BE THOUGHT IN TERMS OF A SCALE, WITH THE “TRUE“ IDIOMS ESTABLISHED AT THE UPPER END AND REGULAR COMBINATIONS AT THE BOTTOM. 
【题目解析】：应该指出的是，习语的习语性是可分级的，最好从规模上考虑，真正的习语建立于顶端，而常规用语在底端。
