giving information; informative 提供信息的;提供有益信息的;提供有趣资料的 ■(Bridge)(of a double) intended to convey information to one's partner rather than to score a penalty (桥牌)(叫加倍)信息性的
语源
late Middle English (but rare before the late 19th cent.): from Latin informat- 'shaped, described' (from the verb informare) + -ory