It was found that there were two types of impure plants in K17A,one was caused by mechanical and biological mix,and the other wa s controlled by polygenes with weak restoring ability.是什么意思_It was found that there were two types of impure plants in K17A,one was caused by mechanical and biological mix,and the other wa s controlled by polygenes with weak restoring ability.在线翻译_英语_读音_用法_例句