prescriptive

adj (fml 文)1 (a) making rules or giving orders or directions 规定的; 指定的; 规范的: prescriptive teaching methods 规定的教学法. (b) (grammar) telling people how they ought to use a language （在指导语言运用方面）规定性的, 规范性的: a prescriptive grammar of the English language 英语规范语法. Cf 参看 descriptive 2. 2 made legal or acceptable by long-standing custom 因长期使用而合法或认可的; 约定俗成的: prescriptive rights 因时效而获得的权利.

prepositional, prepositional phrase, prepossessing, preposterous, preposterously, prerequisite, prerequisite (also pre-condition), prerogative, Pres, presage, Presbyterian, Presbyterianism, presbytery, preschool, prescience, prescient, prescribe, prescribed, prescript, prescription, prescriptively, presence, present, present participle, presentable, presentably, presentation, presenter, presentiment, presently, preservation, preservative, preserve, preserve from, preserver, preset, preside, presidency, president, presidential,