常见例句Through the parameter you can judge whether a gem is uniaxial or biaxial photopositive or photonegative. 根据此参数可以判断一块宝石，是单轴晶体还是双轴晶体，是正趋光性还是负趋光性。photonegative response 背光性,负趋光性photonegative effect 负光电效应 返回 photonegative