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| English | Chinese |
| area /intercellular concentration ratio | 面积/胞间浓度比值 |
| economic concentration The extent to which a market is taken up by producers within a given industry | 经济集中化 (对指定的工业，生产者占据市场的程度。) |
| lethal concentration to 50% | 半致死浓度 |
| maximal immission concentration | 最大注人［污染物］浓度 |
| maximum admissible concentration The maximum exposure to a physical or chemical agent allowed in an 8-hour work day to prevent disease or injury | 最大容许浓度 (8小时工作日中为避免致病或伤害而允许的最大可接触的物理或化学药剂量。) |
| maximum air concentration | 最高空气浓度 |
| maximum allowable concentration | 极限浓度 |
| maximum immission concentration The maximum concentration of air polluting substances in the free environment whose impact when of specified duration and frequency is not objectionable to man, fauna and flora | 最大注入浓度 (特定时段里自由环境中空气污染物的影响不至于引起人类和动植物发生不良反应的最大浓度。) |
| maximum lethal concentration | 最大致死浓度 |
| maximum permissible concentration in water | 水中最大允许浓度 |
| median lethal concentration | 半致死浓度 |
| minimum lethal concentration | 最小致死浓度 |
| permissible immission concentration | 容许注人浓度 |
| pollutant concentration A measure of the amount of a polluting substance in a given amount of water, soil, air, food or other medium | 污染物浓度 (测定污染物质在给定的水、土、空气、食物或其它媒介中的量。) |
| predicted environment concentration | 预测环境浓度 |
| settlement concentration The distribution or total amount of communities, villages and houses within a specified geographic area | 集中安置 (在特定地点安置全体社区、村庄和家庭。) |
| sulphur concentration Sulphur content in a solution | 外围空气的二氧化硫浓度 (硫含量的解决方案。) |
| suspended sediment concentration | 悬浮沉淀物浓度 |
| urban concentration A process in which an increasing proportion of a country's population is concentrated in urban areas | 城市化集中 (国家越来越大比例的人口逐步向城市地区集中的过程。) |