Breathing, Wudalianchi, weather forecast

This paper will introduce three topics: breathing, Wudalianchi and weather forecast to help readers better understand these contents.

The process of breathing

When we breathe, the air passes through the nose, throat, trachea and bronchus from the outside, and finally enters the lungs.

The beautiful scenery of Wudalianchi

Wudalianchi, known as the "Volcano Museum", is an amazing sight.

The process of making weather forecast

The process of making weather forecast includes five steps: meteorological observation, communication, data collection, weather forecast and meteorological service.