Translators do not always need to understand the meaning of the text they are translating, but it is generally necessary in order to accurately convey the ideas and facts of the source text. Translators must be able to maintain or duplicate the written structure and style of the source text while also keeping the ideas and facts accurate. They must also properly transmit cultural references, including slang and other expressions that do not translate literally. In order to do this, translators must have a thorough understanding of the subject matter in which they are translating. They must also be fluent in both the source and target languages, and have a strong understanding of the cultural nuances of both languages. While some translators may be able to convey the words of a text literally, it is often not sufficient to simply convey the words without understanding the meaning behind them.