n.突然；唐突
The abruptness of her appearance at the meeting surprised us all. 她在會(huì)議上的突然出現(xiàn)使我們都吃了一驚。
Events are developing so swiftly that many feel the abruptness of the change and the need to learn anew. 事變是發(fā)展得這樣快，以至使很多人感到突然，感到要重新學(xué)習(xí)。
