Entries are also called headwords. Lexicographic terms. It can be words and phrases, and it can also be composed of words and phrases. Such as: Ming, dynasty name; Beijing, the capital of China; The Democratic People's Republic of Korea, a country located in the northern part of the Korean peninsula; Wait. Among them, "Ming", "Beijing" and "Democratic People's Republic of Korea" are all entries. Entries composed of words and phrases must be fixed, inseparable and not invented. The entry can't be a sentence. For example, "school" is an entry, but "attending classes" is not an entry; "North Korea" is an entry, but "North Korea's capital" is not.