pollution可数吗

介绍service可数吗

1.(可数名词)公共服务系统;公共事业 (1)The government aims to improve public services , especially education. 政府致力于改善公共服务事业,尤其是教育。 (2)..

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Water Pollution 水污染丨外教讲故事

Their deformities are caused by water pollution. 它们的畸形是由水污染造成的。 What leads to water pollution? 水污染是由什么导致的呢? People and b

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