look-down, look through是什么意思

用法例句

Based on the maximum shear stress theory, a theoretical model is developed for the spallation of a plated film under irradiation of a short pulsed laser beam.

基于最大剪应力理论 ,建立了短脉冲激光辐照下光学膜层发生迎光剥落的理论模型 ,导出了膜层剥落的激光功率密度阈值条件和剥落区半径与激光及膜层参数的关系式。