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- Within the range of the test,the germicidal efficacy of the three disinfectants decreased with decreasing temperature and increasing pH value and organic substance concentration. 但在相同浓度条件下，对天然水消毒，二氧化氯消毒液比消毒粉作用时间更长，此可能是试验误差所致。
- A new methodology for estimation of organic substance concentration in coastal marine was proposed based on studies on geostatistics and geographic information system(GIS)software. 通过对地统计学的研究和地理信息系统(GIS)软件的应用,提出了一种基于环境监测数据的估计近海有机物浓度分布的新方法。
- An atom is mostly empty space with almost all its substance concentrated into a tiny kernel called the nucleus, and the electrons can be imagined as flying around the nucleus like a swarm of bees. 原子基本上是个一无所有的空间，其中的所有物质几乎全部集中于一个被称为原子核的微小核心中，而电子则可以假想为一群围绕着原子核飞行的蜜蜂。
- The emery is a hard metallic substance. 金刚砂是非常坚硬的金属物质。
- Barium sulfate is a radiopaque substance. 钡硫酸盐是一种辐射光不能穿透的物质。
- Musk is a kind of strong-smelling substance. 麝香是一种有强烈气味的物质。
- Graphite is a soft black substance. 石墨是一种软而黑的物质。
- This substance is soluble in alcohol. 这种物质能够溶解在酒精中。
- Her account was in substance correct. 她的账目基本上是对的。
- Ammonia is a chemical substance. 氨是种化学物质。
- The substance is irritable to sensitive skin. 这种物质对敏感的皮肤有刺激性。
- An inert substance used to dilute. 稀释剂一种惰性物质
- His area of concentration is nuclear physics. 他的专门研究范围是原子物理学。
- The drug affects one's power(s) of concentration. 这种药影响人精神不能集中。
- The question was never discussed in substance. 这问题实际上从来没有讨论过。
- Gelatin is a clear tasteless substance. 明胶是一种透明无味的物质。
- This substance is extracted from seaweed. 这种物质是从海藻中提取的。
- There is a concentration of people in big cities. 大城市人口集中。
- This substance must be treated with acid. 这材料得用酸来处理。
- They maintained that ghosts had no substance. 他们认为鬼魂不是实物。
