名词
中文翻译：数量
同义词：
['sum', 'total', 'quantity', 'sum up例句：1. The amount of money they spent is $500.（他们花费的金额是500美元。）']
例句：
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1. The amount of money they spent is $500.
他们花费的金额是500美元。
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2. We need to calculate the total cost before we make a decision.
在做出决定之前，我们需要计算总成本。
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3.The teacher asked us to sum up all the problems we had solved.
老师要求我们把所有已经解决的问题加起来。