2. Prepare a white sauce by
melting the butter in a pan, then adding the flour.
做白汁沙司的方法先将黄油在平底锅里融化,然后加入面粉。
3. When
melting snow crystals or raindrops fall through very cold air, they freeze to form small particles of ice, called sleet.
当融化的雪晶或雨滴落下时穿过非常冷的空气,它们会冰冻成很小的冰粒子,称作冰雨。