change bit

例句：

1. 1. The weather has changed dramatically since yesterday.
   自昨天以来，天气发生了巨大的变化。
2. 2.The company is changing its policy to better suit the market.
   该公司正在改变其政策以更好地适应市场。
3. 3. She decided to change her hairstyle for the party.
   她决定为了派对改变她的发型。