| Chinese | English |
| 三级处理 | tertiary treatment The process which remove pollutants not adequately removed by secondary treatment, particularly nitrogen and phosphorus; accomplished by means of sand filters, microstraining, or other methods (referring to wastewater treatment) (去除污染物的过程中通过二级处理没有充分去除污染物，特别是氮、磷污染物的去除；由砂过滤器、微滤或其他方法完成(指污水处理)。) |
| 三级水处理 | advanced water treatment |
| 三级水处理 | tertiary water treatment |
| 三级的废物处理 | tertiary waste treatment |
| 二级变水 类型 | secondarily poikilohydric form |
| 初级处理 | primary treatment Removal of floating solids and suspended solids, both fine and coarse, from raw sewage (粗糙的、浮动的固体和暂时的固体去除。) |
| 初级成分 | primary sector That part of a country's or region's economy that makes direct use of natural resources, including agriculture, forestry, fishing and the fuel, metal and mining industries (一个国家或地区的部分经济，直接使用天然资源，包括农业、林业、渔业和燃料、金属和采矿业等。) |
| 初级的废物处理 | primary waste treatment |
| 初级的水处理 | primary water treatment |
| 初级的污泥 | primary sludge |
| 初级能源消费 | primary energy consumption Consumption of energy used in the same form as in its naturally occurring state, for example crude oil, coal, natural gas, e.g. before it is converted into electricity (在能源消费中使用其天然状态的形式，如原油、煤炭、天然气、电能。) |
| 噪声级 | noise level Physical quantity of unwanted sound measured, usually expressed in decibels (有害声音物理量的测量，通常以分贝表示。) |
| 噪音级指"雪花"干扰的程度 | snow level |
| 市镇级别 | municipal level The jurisdiction, position or status of city, town or local government (城市、城镇或当地政府的司法管辖权、地位或身份。) |
| 极高分辨率高级辐射探测仪 | advanced very high resolution radiometer |
| 次级生物群落 | secondary biotope In the case of disruption of an existing biotope, secondary biotope can be created as a compensation and substitute measure for the loss of the natural one (在已存在的群落分裂的情况下，次级群落是失去原来群落的补充和替代方法。) |
| 次级的废物处理 | secondary waste treatment |
| 次级的水处理 | secondary water treatment |
| 次级的污泥 | secondary sludge |
| 水的污水生物分级 | saprobic water classification |
| 火灾危险分级地区 | fire danger rating area |
| 火灾危险等级 | danger class |
| 禽群等级 | peck order |
| 禽群等级 | pecking order |
| 职业级别效应 | employment level effect The result or impact of a specific policy, action or event upon the number of working-age persons holding jobs in a specific region, nation or sector of the economy (一个特别的政策、行动或事件，对特定区域、国家或经济部门中，工作人员的冲击或结果。) |
| 背景级别 | background level Term used in a variety of situations, always as the constant or natural amount of a given substance, radiation, noise, etc. (此名词使用在多种情况，通常是指自然或者固定含量的某一给定物质、辐射、噪音等。) |
| 顶级群落 | climax A botanical term referring to the terminal community said to be achieved when a sere (a sequential development of a plant community or group of plant communities on the same site over a period of time) achieves dynamic equilibrium with its environment and in particular with its prevailing climate. Each of the world's major vegetation climaxes is equivalent to a biome. Many botanists believe that climate is the master factor in a plant environment and that even if several types of plant succession occur in an area they will all tend to converge towards a climax form of vegetation (一个植物学术语。它指，当一个演替系列(在一段时间内，在同一个地方的一个植物群落或植物群集的一系列发展)在环境中特别是在线性气候中实现动态平衡时，终极群集就实现了。世界上每一种植物的顶级群落对于一个生物群系都是相同的。许多生物学家相信，气候是植物环境的主要因素，即使若干植物继承类型发生在它们将都趋向于形成植物的顶极群落的地区。) |
