北京雾霾英语作文如何写？
初中级版 (适合初中生或英语初学者) The Smog in Beijing** Beijing is a beautiful and famous city. But in recent years, it has a big problem: smog. Smog is a mixture of smoke and fog. It makes the air very dirty and
初中级版 (适合初中生或英语初学者) The Smog in Beijing** Beijing is a beautiful and famous city. But in recent years, it has a big problem: smog. Smog is a mixture of smoke and fog. It makes the air very dirty and