mindmap root((多产)) fertile implies the power to reproduce in kind or to assist reproduction and growth: ~ soil; or it may suggest readiness of invention and development: a most ~ imagination. fecund emphasizes abundance or rapidity in bearing fruits or offspring, or projects, inventions, or works of art: came from a remarkably ~ family. fruitful adds to fertile and fecund the implication of desirable or useful results: undertook ~ research in virology. 病毒学 prolific stresses rapidity of spreading or multiplying by or as if by natural reproduction: one of the most ~ writers of science fiction. multiply乘法倍增，表示增长速度快