second/secondly/second-hand

secondⅠ/ˈsekənd/ I. num. 第二(个)：I’m in the second row. 我坐在第二排。 ‖II. adj. 1. 第二的；次等的；次要的： a second foreign language第二外语 Africa is the second largest continent in the world. 非洲是世界上第二大洲。［考句］Cancer is second only to heart disease as a cause of death. 癌症是仅仅次于心脏病的杀手。second to none首屈一指：The hotel’s restaurant facilities are second to none.这个旅馆饭店的设备是最好的。2.另一的；又一的(常与a连用)：a second Lei Feng 又一个雷锋(式的人物)They had a second house in the country. 他们在乡下还有一幢房子。‖III. n. (人，事物，日期等)第二：on the second of May 在5月2日 He was the second to come here. 他是第二个来的。He got a second in the English contest. 他在英语竞赛中得第二名。‖IV. vt.赞成，附和：second the motion 赞成这个动议；second the proposal 赞成这个建议

secondly adv.其次，第二 

second-hand /ˈsekəndˈhænd]/ I. adj. 二手的，旧的；间接的：a second-hand car二手车；a second-hand bookshop旧书店；second-hand knowledge of her country对她国家的间接了解‖II. adv. 二手；援引地；间接地：tips on the pitfalls to avoid when buying second-hand关于买二手货要避免上当受骗的建议I got this book secondhand.这本书是我以二手货买来的。 I was discounting anything I heard second-hand.凡是间接听来的东西，我都要掂量掂量。He heard the news second-hand他间接地听到消息。

secondⅡ/ˈsekənd/ n.［c］ 秒：A spaceship flies at about eleven kilometers a second. 宇宙飞船每秒大约飞11公里。The average flow of the river is 200 cubic metres per second.这条河平均流量为每秒二百立方米。