Hello dear listeners, today our topic is weather changes. Join Olivia, Daniel and Emma as they discuss the fascinating（迷人的） world of weather using simple English. This discussion is crafted（精巧地制作） for English learners, focusing on clear explanations of words and phrases. For a detailed（细节的） list of vocabulary used, please refer to the description. Hello! Daniel and Emma, have you noticed how the weather has been shifting（替换） lately（近来）?

  Hi, Olivia. Yes, I have. Shifting means changing. The weather can change from sunny to rainy very quickly. Hi, both. It's true.

  These shifts or changes can be surprising. Like（喜欢） when you leave home and it's sunny, but then it starts to rain. Exactly, Emma. And these changes can happen because of the climate, which is the usual weather in a place over a long time. That's right. And sometimes we have extreme weather.

  This means very strong weather, like a big storm or a very hot day. Oh, and we must talk about humidity（湿气）. Humidity is the amount of water in the air. When it's high, it feels very wet and sticky（粘的）. I find that humidity makes hot days feel even hotter. It's like the air is heavy with water.

  And on the topic of hot, let's not forget heat waves. A heat wave is a period of unusually hot weather that can last for days or even weeks. Yes. And during a heat wave, it's important to drink lots of water to stay hydrated. Being hydrated means having enough water in your body. In contrast（对比）, we also experience（经验） cold snaps（猛咬）.

  A cold snap is a short period of very cold weather. True, Olivia. And in some places, people might see frost, which is the thin layer（层） of ice that forms when the temperature drops below freezing（冻）. Speaking of freezing, snow is something many people look forward to in winter.