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。
Leaves are always positively phototropic.
叶子总是正向光性的。
Temperature characteristics of the forward voltage of GaN based blue light emitting diodes
GaN基蓝光发光二极管正向电压温度特性研究
positive thermotropism
向热性, 正向热性
Focus Character for Metamaterial Volume with Regular Polygon Structure under Light Irradiation
光波辐射下正多边形异向介质柱聚焦特性分析
Study of Defect Modes in Two-dimensional Square Photonic Crystal Consisting of Anisotropic Cylinders
二维正方晶格各向异性光子晶体缺陷模
Experimental Research on Forward Electrical and Luminous Characterization in LEDs;
半导体发光二极管正向电学和发光特性的实验研究
tical anisotropy
光学的各向异性;光学各向同性;光学异向性
Drawn to light;exhibiting a positive phototactic or phototropic response.
正趋光性的，光正性的吸光的：显示出阳性趋光的或趋光性反应的
A FDTD method for calculating defect modes in a two dimensional photonic crystalconsisting of anisotropic cylinders
二维正方晶格各向异性光子晶体完全禁带中缺陷模的计算和分析
The[ b] Leo[/ b] Moms feel elated and joyous when presented with something like[ i][ b] sunflower blossoms- the sunflowers[/ b][/ i] define the Leo mothers completely.
向日葵是狮子座母亲的最爱，它迎着阳光生长的乐观向上的个性正好和狮子妈妈不谋而合。
rectness-oriented programming
面向正确性的程序设计
orthotropic deck structure
正交各向异性桥面结构
The circumferential normal stress is tensile.
周向正应力是张性的。
Correct Driving of Forward Laser Transmitter after Total Digital Transition of Television Network
数字整体平移后正向激光发送机的正确激励
and some very early daylight seemed to be reaching us.
一缕曙光也好像正要向我们射过来。
forward-back-scattering type laser current meter
正反向散射型激光流速仪
Put the statue so that the front faces the light.
把雕像摆好, 让正面向着光.
The world is marching toward brightness and progress.
世界正向着光明和进步的目标迈进。