offhand

adj.即时的；未经准备的；唐突无礼的

adv.即时地；未经思索地；随便地

There was something in his offhand remarks. 他随口说出的话里倒也有些道理。

I don't like his offhand manner. 我不喜欢他那粗鲁的态度。

I can't give the answer offhand. 我不能即刻给出答复。

I can't tell offhand how much it will cost. 我不能立刻告诉你它值多少钱。

It is too great a thing for me to decide offhand. 这件事太重大了,不是仓猝之间就能决定的。