adj.填补的；附加的；多余的；感叹的
n.填充词；感叹词；咒骂语
Every other word was an expletive. 每其它词都是填充词。
He uttered several vigorous expletives when he dropped the iron on his foot. 他的熨斗掉下砸在脚上，他随口骂了几声。
虚指词
