北京所处地理位置也颇为不利。北京三面环山、远离大海，如同一个大碗，污染物质易聚不易散。(实习编辑：顾萍)。

Beijing also has geography to battle. It is ringed by mountains on three sides and far from the ocean, trapping pollution as if in a bowl.

youdao

北京所处地理位置也颇为不利。北京三面环山、远离大海，如同一个大碗，污染物质易聚不易散。(实习编辑：顾萍)。

Beijing also has geography to battle. It is ringed by mountains on three sides and far from the ocean, trapping pollution as if in a bowl.

youdao