结论羟苯乙酯是适用于荧光素钠滴眼液的一种抑菌剂.Conclusion Ethylparaben is a good bacterial inhibitor referring to this eye drop in experiment.方法:用葡萄糖酸钙替代传统的醋酸钙、氯化钙并加入抑菌剂.Methods Calcium gluconate gel was prepared by use of bulk calcium glucona...
我们需要有一种超小型车, 而这种就是不超过2,000美元能买到的最好的超小型车.We needed a subcompact, and this was the best one you could buy for under $ 2,000.超小型 无人机 是目前国内外重点研究的自治机器人之一.Sub - mini aerial vehicles ( SMAV ) are mainly studied one of autonomy ...