Every day, it flew to and fro between the mountain and the sea, carrying in a twig or a pebble from the mountain and dropping it into the sea.是什么意思_Every day, it flew to and fro between the mountain and the sea, carrying in a twig or a pebble from the mountain and dropping it into the sea.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句