light-positive是什么意思

用法例句

Basing on the research of stupa buildings of royalty in Northern Wei Dynasty and the reference to the royalty religion activities, this paper conjectures whether the form innovation had been prepared by the stupa buildings development in Zhengguang-years of Northern Wei Dynasty or before.

该文分析了北魏皇室的佛塔建筑,同时参考了皇室成员的宗教活动,由此推测北魏正光年间(520年～525年)及其以前佛塔建筑的发展是否已为形制的创新做好准备。

In optical mineralogy, the relative magnitude of ( N g- N m) and ( N m- N p) are often used to the discrimination of optically positive biaxial crystals from optically negative ones.

它们之间的关系如果是Ｎｇ－Ｎｍ＞Ｎｍ－Ｎｐ时，矿物为正光性；反之，则为负光性。