I've got some questions for you to think about.
我有一些问题要你们想一想。
What happens when water boils? What happens when water freezes?
当水煮沸时会发生什么？当水结冰时会发生什么？
What happens when ice melts? What happens when steam cools down?
当冰融化时会发生什么？当水蒸气冷却时会发生什么？
When water boils, it turns into steam.
当水煮沸时，它会变成水蒸气。
When water freezes, it turns into ice.
当水冰冻时，它会变成冰。
When ice melts, it turns into water.
当冰融化时，它会变成水。
When steam cools down, it turns into water.
当水蒸气冷却时，它会变成水。
