Placochelys looked remarkably similar to a sea turtle, possessing the same flippers (albeit with short toes), flat but knobbly shell and compact skull.是什么意思_Placochelys looked remarkably similar to a sea turtle, possessing the same flippers (albeit with short toes), flat but knobbly shell and compact skull.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句