4. 我们面临的最大问题之一是空气污染的翻译：4. one of the biggest problems we face is that air pollution 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

4. one of the biggest problems we face is that air pollution

4. We face one of most major problems is the air pollution

4. * we face is one of the biggest problems air pollution

4. one of the biggest problems we face is that air pollution