名词
中文翻译：突然变化
同义词：
['rapid change', 'sudden alteration例句：1. The weather has undergone a sudden change.（天气发生了突然变化。）']
例句：
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1. The weather has undergone a sudden change.
天气发生了突然变化。
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2. The company announced a sudden change in its policy.
公司宣布了其政策的突然改变。
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3. The economy is experiencing a sudden change in direction.
经济正在经历方向的突然改变。