substructure

n underlying or supporting structure; base or foundation 下部结构; 支撑结构; 基础; 根基. Cf 参看 superstructure 1.

subsist, subsistence, subsistence crop, subsistence level, subsoil, subsonic, substance, substandard, substantial, substantially, substantiate, substantiation, substantive, substantively, substation, substitute, substitute for, substitute...for, substitution, substratum, subsume, subtenancy, subtenant, subtend, subterfuge, subterranean, subtitle, subtle, subtlety, subtly, subtopia, subtopic, subtotal, subtract, subtraction, subtropical, suburb, suburban, suburbanite, Suburbia,