这张图上描述了什么？---**Extracted Content:** **Title:** 24小时预报 **Chart Description:** * **Type:** Line chart showing temperature over time, with additional information sections below. * **Main Elements:** * **Y-axis:** Represents temperature, with labels 18° and 32°. * **X-axis:** Represents time, labeled at intervals: 18:00, 20:00, 22:00, 00:00, 02:00. * **Temperature Line:** A fluctuating blue line depicting the predicted temperature over the 24-hour period shown. * **Annotation:** A callout box at the point around 18:00 indicates "18:00 晴 30°". * **Weather Icons:** Icons are displayed below the temperature line representing weather conditions: Sun icon (around 18:00), Sun behind cloud icon (around 20:00-22:00), Rain icon (around 02:00). * **Air Quality Section:** Located below the weather icons. Label "空气" (Air) is on the left. A colored bar is present, with a yellow segment labeled "轻度污染" (Slightly Polluted) below the 18:00 mark. * **Wind Power Section:** Located below the Air Quality section. Label "风力" (Wind power) is on the left, accompanied by a wind symbol. The text "4级" (Level 4) is displayed horizontally across a section, approximately from 20:00 to 00:00. **Textual Information:** * 24小时预报 (Title) * 32° (Y-axis label) * 18° (Y-axis label) * 18:00 (X-axis label) * 20:00 (X-axis label) * 22:00 (X-axis label) * 00:00 (X-axis label) * 02:00 (X-axis label) * 18:00 晴 30° (Annotation text) * 轻度污染 (Slightly Polluted - below sun icon, associated with yellow bar) * 空气 (Air - label on left) * 风力 (Wind power - label on left) * 4级 (Level 4 - wind power rating)