简答题 'Baby talk' is a term used to label the word forms that many adults use when speaking to children. Examples in English are choo-choo for 'train' and bow-wow for 'dog'. Baby talk seems to exist in every language and culture. At least two things seem to be universal about baby talk: the words that have baby talk forms fall into certain semantic categories(for example, food and animals)and the words are ' phonetically simpler' than the adult forms(for example, tummy[t∧mi]for 'stomach'[st∧m?k]). List all the baby talk words you can think of in Chinese; then(1)separate them into semantic categories, and(2)try to state general rules for the kinds of phonological simplifications that occur.