propone 是 postpone 吧. prolong vt.拖延;延长.及物动词.例:They prolonged their visit by two days.他们延长访问二天. postpone vt.使…延期;把…放在次要地位;把…放在后面.也是及物动词,但通常以被动语态出现,例:The match was postponed to the next day because of bad weather.比赛因天气不好而延期到第二天进行. 还可以作为不及物动词使用 vi.延缓,延迟;延缓发作