That's the first difference between a beam of ordinary light and a laser beam.
这是第一个不同点在普通光束和镭射光束之间。
The viscoelastic simple beam is taken as the mechanical model of flexible foundation with beam-wise.
本文以均匀粘弹性简支梁作为梁形柔性基础的力学模型。
The viscoelastic simple beam is taken as the mechanical model of flexible foundation with beam-wise.
本文以均匀粘弹性简支梁作为梁形柔性基础的力学模型。
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