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1.The construction crew used dry backfill sand to fill in the gaps in the foundation.
施工队伍使用干燥回填沙来填补地基的空隙。
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2. During the rainy season, it's important to use dry backfill sand to prevent water infiltration.
雨季期间,使用干燥回填沙以防止水分渗透是很重要的。
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3. The engineer recommended using dry backfill sand instead of traditional fill materials for this project.
工程师建议使用干燥回填沙而不是传统的填充材料进行这个项目。