bó / wù / guǎn / zhǎn / chū / de / biāo / běn / shuō / míng / dù / yā / shì / tǐ / xíng / hěn / dà / de / wū / yā博物馆展出的标本说明,渡鸦是体型很大的乌鸦。The museum specimen shows that the raven is a very large type of crow.