不知怎么地,他在解这道数学题时又算错了.Somehow he again made a mistake in solving the mathematical problem.服务员算错了账.The waiter got his arithmetic wrong.账算错了, 少一块钱.This account is wrong; we're one yuan short....
There was an impassable barrier between the white race and the one which they had reduced to slavery.在白色人种和被他们奴役的种族之间有一道不可逾越的障碍。The avenue had never been paved, and deep mud made it impassable in winter.这条大街从未铺过路面,冬天泥泞不堪...