The study did research on Test group (top Taekwondo trainers, TG) and Control group (common Taekwondo trainers, CG) by the PWC170 and elimination rate of blood lactic acid.

本实验从PWC170及血乳酸清除率等指标对实验组(优秀跆拳道运动员)，对照组(普通跆拳道运动员)进行对比研究。

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By investigation found that our existing methods of dust spray equipment and the dust is the common problem of dust control efficiency is not high, respirable dust and dust all settlement rate is low.

本文通过调研发现，我国现有的喷雾降尘方法和降尘设备普遍存在的问题是降尘效率不高，呼吸性粉尘和全尘的沉降率低。

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Caesarean was quite common method of delivery in premature delivery, and the postnatal hemorrhage rate and the asphyxia rate of newborn were significantly higher than that of the control group.

剖腹产仍是早产分娩较常见的分娩方式，且产后出血率和新生儿窒息率显著高于对照组。

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