Hastily means you do something in a hurry — and, more honestly, often a little too fast. If you pack hastily, a sock is still on the bed. If a plan is hastily made, people did it at the last minute and it may be messy.

Hastily「hastily」 means指的是 you do something in a hurry你匆匆忙忙地做某件事 and, more honestly而說得更老實一點 often a little too fast常常是太快了一點。If you pack hastily如果你hastily地打包 a sock is still on the bed床上還留著一隻襪子。If a plan is hastily made如果一個計畫是hastily訂出來的 people did it at the last minute代表大家是在最後一刻趕出來的 and it may be messy而且可能很亂。

So it is not a clean twin of quickly. Quickly can be neat and skilled; hastily usually carries a small warning that care was missing.

So所以 it is not a clean twin of quickly它跟quickly（很快地）並不是完全對等的雙胞胎。Quickly「quickly」 can be neat and skilled可以是俐落又熟練的 hastily「hastily」 usually carries a small warning通常帶著一點小小的警訊 that care was missing表示少了應有的用心。

You can use it in speech and in writing. It is not slang, and it is not stiff.

You你 can use it可以用它 in speech and in writing在口語和書面裡都可以。It它 is not slang不是俚語 and it is not stiff也不呆板生硬。

Teachers use it when they mean “slow down a bit.” Though actually, it is not always a scolding: you can say you hastily agreed just to be kind, or hastily added a name you had forgotten. The feeling is still “without much pause.”

Teachers老師 use it用這個字 when they mean "slow down a bit."當他們的意思是「慢一點」 Though actually不過 it is not always a scolding它不一定是在責備 you can say你可以說 you hastily agreed just to be kind你hastily地答應只是為了體貼別人 or hastily added a name you had forgotten或是hastily補上一個你忘記的名字。The feeling這種感覺 is still仍然是 "without much pause."「沒有太多停頓」。