名词
中文翻译：近似
同义词：
['approximate', 'approximation']
例句：
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1. The distancebetween the two cities is approximately 500 kilometers.
两座城市之间的距离大约是500公里。
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2. The cost of thisproduct is approximately $30.
这个产品的成本大约是30美元。
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3. The errorin this calculation is approximately 10%.
这个计算中的错误大约是10%。