sub-
pref 前缀
1 (with ns and adjs 与名词和形容词结合) under; below 在...之下; 低於...
subway * subsoil * submarine.
2 (with ns 与名词结合) lower in rank; inferior 级别较低的; 次於...的: sub-lieutenant
subspecies.3 (with adjs 与形容词结合) not quite; almost 不完全的; 近似的: subnormal
subtropical * substandard.
4 (with vs and ns 与动词和名词结合) (form a) smaller or less important part of （形成）...之较小的或次要的部分: subdivide
subcommittee * subset. Cf 参看 under-.