名词
中文翻译：样本底部
同义词：
['bottom sample', 'bottom layer', 'bottom layer sample']
例句：
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1. The engineer needs to test the new product before it goes into production.
工程师需要在产品投入生产前测试新产品。
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2.The company is looking for a bottom sample to help them improve their marketing strategy.
该公司正在寻找一个底层样本，以帮助他们改进他们的营销策略。
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3. The scientist collected samples from the bottom of the ocean and analyzed them to find out how deep the water was.
科学家从海洋的底部收集了样本并进行分析，以确定水有多深。