| environ. | 多氯二苯并呋喃 | polychlorinated dibenzofuran A family containing 135 individual, colorless compounds known as congeners with varying harmful health and environmental effects. They are produced as unwanted compounds during the manufacture of several chemicals and consumer products such as wood treatment chemicals, some metals, and paper products; also produced from the burning of municipal and industrial waste in incinerators, from exhaust of leaded gasoline, heat, or production of electricity. They are hazardous to the respiratory system, gastrointestinal system, liver, musculoskeletal system, skin and nervous system; and are toxic by inhalation, ingestion, and contact. Symptoms of exposure include frequent coughing, severe respiratory infections, chronic bronchitis, abdominal pain, muscle pain, acne rashes, skin color changes, unexpected weight loss, nonmalignant or malignant liver disease (一个包含135种个体的化合物族，其中的无色化合物个体包含的有效杂质有害人体健康和对环境产生不利影响。这类化合物一般是作为不希望得到的化合物在生产过程中产生的，比如木处理化学品，某些金属、纸制品生产的附属物，也可以从燃烧工业废料中产生。它们对呼吸系统、消化系统、肝脏、皮肤和骨骼系统、神经系统都有害。吸入、摄入和接触后会产生中毒症状，包括严重的呼吸道感染、咳嗽、慢性支气管炎、腹部疼痛、肌肉疼痛、痤疮皮肤皮疹、皮肤颜色变化、体重下降和一些肝脏恶性疾病。) |
