海洋微生物腐烂后沉积形成磷酸盐。The phosphate was deposited by the decay of marine microorganisms.流入湖中的泉水和河水携带了溶于水的硝酸盐和磷酸盐。Springs and rivers that drain into lakes carry dissolved nitrates and phosphates.我们使磷酸盐岩同硫酸发生化学反应制造过磷酸钙.We make s...
Lean hard-training women athletes may menstruate less frequently or not at all.身材瘦削而且训练艰苦的女运动员行经可能不那么频繁，或者根本不来月经。sweltering athletes.中暑的运动员The athletes’ reflexes were tested under laboratory conditions.在实验室条件下测试了这些运动员的反应...
The pathogens causing red gardenia browning and rotting were Aspergillus niger v.引起贮藏期红栀子果实发生褐变腐烂的病原菌为黑曲霉和黄曲霉.Here is an Aspergillus fungus ball in a dilated bronchus.可见扩张支气管内的曲霉菌真菌球.Aspergillus Oryzae mutants . High pre...