名词
中文翻译：半年度变化
同义词：
['semi-annual change', 'semi-annual fluctuation']
例句：
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1. The weatherhas a semi-annual variation in the summer and winter.
天气在夏天和冬天有半年的变化。
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2. The stock market has shown a semi-annual variation in its performance.
股市的表现有半年的波动。
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3.The company's revenue has experienced a semi-annual variation due to fluctuating demand.
由于需求的波动，公司的营收经历了半年的波动。