Don't fall behind now, just when you're doing so well.你干得很出色,这个时候可别后退.Don't fall behind with your gas bill.不要拖欠煤气费.Put on a spurt, or you'll fall behind.加把劲, 不然你要落后了....
Signs across the entrances warn all visitors to stub out their cigarettes.入口处的告示牌提醒游客们熄灭香烟。Analysts warn us away from drawing any conclusions.分析家劝告我们不要妄下结论。Soon an official appeared to warn them away.很快一位官员出来劝告他们离开。...