因为介词against有“靠，倚”的意思。如：I put the ladder against the wall.除此之外，还表示“与…竞争，对垒”。如：They played against the best team and won the game. 还有“反对”的意思。如： Im...

again [E5^ein] adv. 又, 再次, 此外, 再一次 again [E5^ein, E5^en] adv. 再；又； 再一次 try again 再试一次 home again 回家 well again 恢复健康 See you again. 再见。 Come again. 请再来。 Please say that again. 请...