Definition

Examples

• 政府正在调查这条河的污染源。
  Zhèngfǔ zhèngzài diàochá zhè tiáo hé de wū rǎn yuán.
  The government is investigating the pollution source of this river.
• 工厂是城市空气污染的主要污染源。
  Gōngchǎng shì chéngshì kōngqì wūrǎn de zhǔyào wū rǎn yuán.
  Factories are the main pollution source of urban air pollution.
• 找到污染源是治理环境污染的第一步。
  Zhǎodào wū rǎn yuán shì zhìlǐ huánjìng wūrǎn de dì yī bù.
  Finding the pollution source is the first step in controlling environmental pollution.