英漢例句雙語例句Why doi birds fly south?鳥爲什麼往南飛?。Why do birds fly south?鳥爲什麼往南飛?。www.zk168.com.cnWhy do birds fly south for the winter?爲什麼鳥兒在鼕天的時候飛往南方？blog.sina.com.cn原聲例句Birds fly south because they know winter is coming.birds fly south更多例句詞組短語短語The Birds Fly South 第十六章birds fly south更多詞組