“sand”的概念、定义、翻译、参考文献-科学参考

单词	sand
释义	sand Encyclopedia 工学[矿物材料]释 sand砂一种粒径在0.05～2毫米的碎屑。农学砂粒释 sand砂粒土壤物质中粒组直径在50微米（美国制）或20微米（国际制）～2毫米的成分。是土壤物质的最大粒组。理学﹝土力学基本概念﹞释 sand砂土粒径大于2毫米的颗粒含量不超过全重50%，且粒径大于0.075毫米的颗粒含量超过全重50%的无黏性土。
随便看	Planning Theory Forum planning theory of communication planning under nondeterministic environment planning unit planning verification planning verification after the completion of the construction project planning vision plano-concave lens plano-convex lens Plan of Agua Prieta Plan of Ayutla Plan of Baranquilla Plan of Cape to Cairo Railway Plan of Casa Mata plan of dictionary project plan of direction Plan of grassland protection and utilization in the 13th Five-year Plan Plan of Greater Helsinki（1918） Plan of Guadalupe Plan of Hegel’s Dialectics (Logic) Plan of Manchurian Railroads Neutralization plan of national geoparks Plan of Preservation of Historic Cities Plan of railcar fleet size Plan of Rural Vitalization Strategy(2018—2022)

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。