CONCLUSION: antibacterial use density is an ideal index for reflecting the use of antibacterials.
结论：抗菌药物使用密度是反映抗菌药物应用情况的一个较为理想的指标。
The bone mineral density (BMD) means the bony mineral quantity per unit area, which is an important index reflecting the metabolic status of the skeleton of human being.
骨密度是指骨单位面积所含的骨矿物量，它是反映人体骨骼代谢状况的一项重要指标。
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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