在线词典投书投交书信。亦指所投交的书信; 谓将文书或信件投入水中; 扔下书籍。拼音tóu shū解释投交书信。亦指所投交的书信; 谓将文书或信件投入水中; 扔下书籍。英文释义to submit a written piece (letter, article, opinion piece etc)