呼吸的工作原理
How Breathing Works
知道我们通过鼻子和嘴巴把空气吸进肺里；肺从空气中吸取身体维持生命所需的氧气；我们呼出的是身体不需要的二氧化碳。
Know that we breathe air into our lungs through the nose and mouth, that our lungs take in oxygen from the air which our body needs to stay alive, and that we breathe out carbon dioxide as waste
学习证据 / Evidence
- 指出空气的路径：鼻子/嘴巴 → 气管 → 肺
- 说出肺从空气中吸收身体需要的氧气
- 说出我们呼出的是身体不需要的二氧化碳
- Trace the path of air: nose/mouth → windpipe → lungs
- State that lungs take oxygen from the air, which the body needs
- State that we breathe out carbon dioxide, which the body doesn't need
评估问题 / Assessment
跑动之后，{{name}}能否注意到自己呼吸变快，并解释说肺正在吸入身体需要的空气？
After running around, can {{name}} notice their faster breathing and explain that their lungs are taking in air that the body needs?