self-focused laser beam是什么意思

用法例句

Phase-independent response of a focused laser beam on a ferrofluid slab to A. C. magnetic field;

磁流体薄片中聚焦激光束对交流磁场的相位独立响应(英文)

Non-adaptive transformations are effective in calculating the propagations of the focused laser beams.

非自适应坐标变换对于提高计算聚焦激光束传输问题的精度和速度非常有效。