The small boy soon became tired and lagged far behind (the rest of the walkers). 那小男孩儿不 久就走不动了,远远落在(其他人的)後面。
A Soviet crash program to catch up with the West in designing powerful new computers is beginning to pay off, but the Russians still lag far behind, according to industry reports. 根据电脑业报导,苏联为了在设计强力新型电脑上赶上西方所实行的紧急计划,已开始收效,可是俄国人仍远远落后。