① 迄今;到目前为止(到此刻为止) 本义 副词 元始域 理据— 例句Hitherto unknown, the letters were found in an old drawer.这些信件此前不为人知,是在一个旧抽屉里被发现的。The results have not been announced hitherto.结果迄今尚未公布。 溯源路径本义