The main reason why it is difficult to learn idioms is that its allusions often come from ancient documents. Sometimes it is a condensed story, sometimes it is an excerpt from the words of the ancients. No matter what, besides the original meaning of the source, it also has the extended meaning of later usage. When using idioms, the two levels of meaning often produce functions at the same time. Therefore, you have to pay attention when using idioms to avoid misquoting. Application features: Th