Any of numerous plants of the genus Asclepias,having milky juice,usually opposite leaves,variously colored flowers grouped in umbels,and pods that split open to release seeds with downy tufts.是什么意思_Any of numerous plants of the genus Asclepias,having milky juice,usually opposite leaves,variously colored flowers grouped in umbels,and pods that split open to release seeds with downy tufts.在线翻译_英语_读音_用法_例句