tail /teɪl/ ► SEE ALLtail awaytail back tail off●ˌtail aˈway➡tail off●ˌtail ˈback (BrE) if traffic tails back, it forms a long line that moves very slowly or not at all（受阻车辆）排成长龙◆After the accident, traffic tailed back ten miles. 事故发生后，受阻车辆排了十英里长。[v + adv]▸ˈtailback
noun
(BrE) a long line of traffic that tails back受阻车辆排成的长龙◆The crash caused a six-mile tailback. 撞车事故使受阻车辆排了六英里长。●ˌtail ˈoff ( ˌtail aˈwayless frequent) to become smaller, fewer, weaker, etc.变小（或变少、变弱等）；逐渐消失◆Sales tailed off in the summer. 夏季销售额不断下滑。◆The number of tourists starts to tail off in September. 从 9 月起，游客人数开始逐步减少。◆Her voice tailed away. 她话音越来越低。◆‘Did you want to see…’ she tailed off. “你是不是想看…”她的声音低了下去。➡ note at dwindle away[v + adv]