Nitrates are chemicals that occur naturally in water and the soil.硝酸盐是水和土壤中自然存在的化学物质。Nitrates leach from the soil into rivers.硝酸盐由土壤渗入江河。Nitrates are used as preservatives in food manufacture...硝酸盐在食品加工业中被用作防腐剂。Springs a...
However, there are not consistent brittleness indexes by now.然而, 迄今为止,脆性指标并不一致.It is difficult to determine basic assessable variable of the indexes in model analysis.结合防空兵作战能力评估模型,运用“云重心”理论确定了评估模型中各指标基本评定值.The cerusite ...
义齿各部位出现铸造缺陷机率:卡环小连接体处较高, 下颌高于上颌.The incidence of casting defect is higher in the clasp and minor connecter, mandibular than maxillary.它们被分成两个或三个明显的体部, 并连接体节的附肢.They have segmented with two or three distinct parts, and jo...
It is a part of Britain as yet largely unaccustomed to tourists.英国的这一块地方还很不为游客所熟悉。He began to comfort me with such unaccustomed gentleness.他开始以那种少有的温柔安慰我。His nose had been reddened by unaccustomed exposure to the Califor...