名词短语
中文翻译：起起落落
同义词：
['waves', 'fluctuations', 'ups and downs']
例句：
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1. The stock market is known forits ups and downs.
股市以其起伏不定而闻名。
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2. The economy has beenexperiencing ups and downs recently.
最近经济经历了起伏不定。
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3. The company'sperformance has been ups and downsover the past year.
过去一年中，该公司的表现起伏不定。