Translate the following paragraph into Chinese. Nouns, verbs, adjectives, adverbs, and numerals are the content words. These words denote concepts such as objects, actions, attributes, degree, quantity, and ideas that we can think about like children, soar, fragile, gracefully, and seven. Content words are sometimes called the open class words because we can and regularly do add new words to these classes. A new word, steganography, which is the art of hiding information in electronic text, entered English with the Internet revolution. Verbs like disrespect and download entered the language quite recently, as have nouns like byte and email.