slow lens

Conclusion Progressive multi-focal lens may slow down the progression rate of myopia in schoolchildren, but more work should be done to clarify its mechanism.

结论渐进多焦点眼镜对青少年近视度数的发展可能有一定的控制作用，但其控制近视的详细机理有待进一步证实。

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Lens slow down, fixed his feet in the feathers.

镜头缓缓下移, 定格在他脚边的那片羽毛.

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But beam quality of slow axis is easily affected by space burned hole, self-focusing and thermal lens effect, which lead to big slow axis divergent angle under high output power.

然而由于其慢轴方向输出光束质量极易受到空间烧孔、自聚焦、热透镜等效应的影响，致使其在高功率工作条件下，输出的慢轴方向发散角较大。

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