So really, you can not ever rotate a double bond, it makes your molecule very rigid.
实际上，你不能转动一个双键，它使得你的分子很坚固。
The large TPA cross section may result from the intensive linear absorbance of the molecule due to its conjugate rigid plane structure, and the two-photon resonance excitation condition.
该分子具有大的TPA截面是起源于该分子的刚性平面共轭结构所固有的线性吸收特性和TPA共振增强；
A simple method is used to calculate the phase volumes enclosed by energy surfaces of 2-dimensional harmonic oscillator and rigid diatomic molecule.
用初等方法计算了二维线性谐振子和刚性双原子分子两种情况的能量曲面所包围的相体积。
SA's complementary wall-building mechanism includes: the molecule has a rigid ring can resist high temperature;
而SA的高温高压辅助造壁机理包括：分子中具有刚性基团可以抗高温；
SA's complementary wall-building mechanism includes: the molecule has a rigid ring can resist high temperature;
而SA的高温高压辅助造壁机理包括：分子中具有刚性基团可以抗高温；
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