She acted in an off-hand way.

她不假思索地行动。

I can't say for certain off-hand.

标准答案：我还不能马上说定。

Can you mention one of the mistakes off hand?

你能马上指出其中一个错误吗?。

Anything else missing? A:I've no idea off hand.

还丢了其它的东西吗？我一时还不知道。

To this the unthinking will give an off-hand answer .

给我一个直截了当的答复。

It is a pair of daggers a main-hand and an off-hand dagger.

它是一对匕首——一把主手和一把副手匕首。

He said he would have done, only you treated him so off-hand.

他说他本来会做的，只是你待他太不客气了。

To succeed in this world, we must stick to it; Sword to death can off hand.

要在这个世界上获得成功，就必须坚持到底；剑至死都不能离手。