-
Environmental disasters are primary pollution source in the coal mine area.
地质灾害是煤矿区环境污染的主要发生源。
youdao
-
Disposal of nonbiodegradable waste is a primary source of pollution.
对非生物降解物的处理是污染的主要来源。
youdao
-
Disposal of nonbiodegradable waste is a primary source of pollution.
对非生物降解物的处理是污染的主要来源。
youdao