名词
中文翻译：底部
同义词：
['bottom', 'base', 'foundation']
例句：
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1. The engineer inspected the all bottom of the machine.
工程师检查了机器的全部底部。
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2. The construction project was completed on time, despite encountering some all bottom issues.
尽管遇到了一些底层问题，但该项目还是按时完成了。
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3. The scientist conducted experiments on the all bottom of the ocean floor.
科学家在海底的底层进行了实验。