Based on these equations, an evolution equation of the beam waist has been obtained.
由光束在吸收克尔介质中传输的非线性近轴波方程 ,推导出具有二次相位分布的圆对称高斯光束在线性吸收介质中的耦合传输方程以及光束束腰的演化方程。
the restraints of illness
病的束缚 [拘束]
piled in graceful sheaves,
整整齐齐地一束束堆着，
illuminating laser beam
照射激光束，照明激光束
twin-cathode ray beam
双电子束，双阴极射线束
Bundles of flowers were put before the doorsteps.
一束束鲜花放在门阶前。
high flux electron beam and ion beam
强流电子束和离子束
collimated lihgt beam
准直光束，平行光束
Such constraints are said to be holonomic.
这种约束称为完整约束。
end of volume (EOV)
卷结束;卷结束;卷结束符;卷结束符;卷终;卷终
Three Restraints to Entrepreneurs;
企业家约束:自我约束、外在约束与制度约束
A tuft, as of fiber or hair.
毛束，棉束如纤维或毛发等的一束
Study of Laser Beam Width, Beam Quality and Focal Shift;
激光光束束宽、光束质量和焦移的研究
end-of-transmission-block character (ETB)
传输块结束符;块传输结束符;块传送结束符
beam forming optics
射束形成光学;聚束光学系统;聚束光学系统
A restraining or confining agent or force.
束缚力，拘束力约束或限制的机构或力量
This device splits the light beam into a measuring light beam and a reference light beam.
此设计把光束分成测量光束和参化光束。
The act of binding oneself by a social, legal, or moral tie.
束缚被社会，法律或道德约束和束缚自己的行为
Once the headache is over, the Migraine attack may or may not be over.
头痛期结束后，偏头痛发作结束或者还没结束。