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| English | Chinese |
| background air pollution monitoring network | 背景空气污染监控网 |
| background level Term used in a variety of situations, always as the constant or natural amount of a given substance, radiation, noise, etc. | 背景级别 (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。) |
| background noise Noise coming from source other than the noise source being monitored | 背景噪音 (来自非监测渠道的噪音。) |
| background pollution | 本底污染 |
| background radiation Radiation resulting from natural sources, as opposed to man-made sources, and to which people are exposed in everyday, normal life; for example from rocks and soil | 背景辐射 (来自于自然界的辐射而非来自于人为来源的辐射，正常情况下人们每日都暴露于此辐射下，例如来自于岩石和土壤。) |