At first balls were made of grass or leaves held together by vines. Later they were made of pieces of animal skin sewed together and stuffed with feathers or hay.是什么意思_At first balls were made of grass or leaves held together by vines. Later they were made of pieces of animal skin sewed together and stuffed with feathers or hay.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句