名词
中文翻译：Unknown
同义词：
['subsurface filler', 'underlayer filler例句：1. The engineer used a special material to fill the cracks in the concrete surface.（工程师使用一种特殊的材料来填充混凝土表面的裂缝。）2. The under-surface filling was designed to improve the durability of the building.（这种表面下的填充物设计用来提高建筑物的耐用性。）3. The construction crew carefully placed the under-surface filling to ensure proper drainage.（施工队小心翼翼地放置了表面下的填充物，以确保排水畅通。）']
例句：
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1. The engineer used a special material to fill the cracks in the concrete surface.
工程师使用一种特殊的材料来填充混凝土表面的裂缝。
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2. The under-surface filling was designed to improve the durability of the building.
这种表面下的填充物设计用来提高建筑物的耐用性。
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3. The construction crew carefully placed the under-surface filling to ensure proper drainage.
施工队小心翼翼地放置了表面下的填充物，以确保排水畅通。