man-made与synthetic如何区别?

man-made与synthetic如何区别? fasle artificial man-made fake imitation synthetic 做人造的假的意思是有何区别? synthetic synthetic synthetic synthetic synthetic man-made a made man man–made man-made的反义词? man—made man-made是什么语法 man-made中文意思 SELF MADE MAN怎么样 一篇英语阅读题In fall 2006,the National Basketball Association (NBA) started using basketballs mad with synthetic,or man-mad,material instead of leather（皮革）.They made the change because they wanted every basketball they use to feel and BONDED SYNTHETIC Synthetic是什么意思