名词
中文翻译：粗略估计
同义词：
['rough calculation', 'rough guess']
例句：
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1. We made a rough estimate of the cost before we started.
我们在开始之前粗略估算了一下成本。
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2. The engineer used a rough estimate to determine the time required for the project.
工程师使用了一个粗略的估计来确定项目所需的时间。
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3. The salesperson gave me a rough estimate of how much I could save by switching to their product.
销售员给我提供了一个粗略的估计，告诉我通过换用他们的产品我能够节省多少钱。