If he missed it,it would be all but impossible to arrange for another one.
问题描述：
If he missed it,it would be all but impossible to arrange for another one.
请问：it would be all but impossible
答
主要妨碍你理解的是这个词组 all but
意思是 almost 几乎
例句:The party was all but(almost) over when we arrived.
我们到达时,聚会已经快结束了.