多样

It serves as a kind of breather for people since they may be bored of doing the usual routinary jobs.

给厌倦了日常工作的员工提供一个新鲜的环境。

Based on Fresnel Kirchhoff diffraction integral equation, a mathematical model on the diffraction of nonlinear optical media to Gaussian beam is established.

从菲涅耳基尔霍夫衍射积分公式出发，建立了非线性光学介质对高斯光束的衍射模型，通过数值积分，得到了与实验现象符合的计算结果。