“ballast bed”的概念、定义、翻译、参考文献-科学参考

单词	ballast bed
释义	ballast bed Encyclopedia 工学[轨道部件]释 ballast bed碎石道床用散粒体碎石道砟构筑的轨下基础。
随便看	convexity problem convexity property convexity radius convexity theorem convexity upward convex kite convex lattice convex lens convex linear combination convexly convex manifold convex mapping convex metric convex metric space convex mirror convex neighborhood convex norm convex object convexo-concave convexo-concave lens convexo-convex convexoid convex operator convexo-plane convex optimization

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。