A task or activity that is done has been completed successfully.
When her deal is done, the client emerges with her purchase.
交易完成后,顾客拿着购买的东西出来了。
When something that you are cooking is done, it has been cooked long enough and is ready.
As soon as the cake is done, remove it from the oven.
蛋糕一烤好,就把它从烤箱里拿出来。
You say 'Done' when you are accepting a deal, arrangement, or bet that someone has offered to make with you.
'You lead and we'll look for it.'—'Done.'
“你带路,我们来找!” “好的!”
Done is the past participle of do.