If we had been careful such a calamity would not have befallen us.假如我们谨慎的话,这种灾难不会降临到我们的头上.They supposed that some calamity had befallen the Governor.他们心想这位先生一定遇到了什么无妄之灾.An accident has befallen him.一件不测的事已临到他....
By the time he's twenty he'll know everyone worth knowing in Washington.到20岁时,他就会认识华盛顿所有值得认识的人。Take a hundred and twenty values and calculate the mean.取120个值计算平均数。Southbound traffic tailed back for twenty miles...