白色污染的源头是烟头。
机械设备在运行中的泄漏，是当前环境污染的源头之一。
The leakage of mechanical equipment in the operation is one of the source for the pollution to environment.
用纺织纤维做的过滤口袋，用于在工业生产中回收有价值的物质，对大气污染的源头进行控制。
Bag filter; baghouse filter Fabric filter used in industrial operations to recover valuable matter as well as to control atmospheric pollution at the source.
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