Laser focuses onto a target, producing an ablation back-jet, which provides a micro-impulse.

激光脉冲作用于工质，使工质烧蚀反喷，产生微小冲量。

youdao

With the increase of etching depth, the generated particles are difficult to escape from micro-structures, causes so that the ablation rates decreases.

随着刻蚀深度的增加，光解生成物的脱出变得困难，从而导致刻蚀速率的降低。

youdao