形容词
中文翻译：Unknown
同义词：
['near', 'roughly', 'approximately']
例句：
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1. The temperature is approximately 30 degrees Celsius.
温度大约是30摄氏度。
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2. The book is approximately 500 pages long.
这本书大约有500页长。
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3. He estimated the time of arrival to be approximately three hours.
他估计到达时间大约是三个小时。