Slow efficiency at threshold is observed to be nearly constant over the wide range.

在广域范围内观测到的低效阈值近似为常数。

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The pain threshold of right hind limb, sciatic nerve function index (SFI) and pathological change were observed.

观察每组右后肢的痛阈、坐骨神经功能指数(SFI)及病理改变。

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The results show: pulse power density from CO2 laser reaches air breakdown threshold through thrice reflecting focus system, and plasma radiation phenomena is observed in the experiment.

结果表明，脉冲co 2激光功率密度经三次反射激光聚焦系统达到空气击穿阈值，实验中观察到等离子体发光现象。

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