名词
中文翻译：垫层
同义词：
['underlay', 'base layer']
例句：
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1. The engineer laid down the foundation for the new building.
工程师为新建筑打下了基础。
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2. The road was smooth and level, providing a good foundation for driving.
道路平整光滑，为驾驶提供了良好的基础。
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3. The artist used different materials to create a unique underlay for her painting.
艺术家使用不同的材料来创造她画作的独特底层。