The younger generation, conscious of strength and tumultuous, have done with knocking at the door; they have burst in and seated themselves in our seats.

have done with （习语，仅限于完成时）：

字面意思：已经做完了某事——引申为“不再做某事”——涉及本句意思是：不再敲门；没有敲门。

have done with ，由于字面意思是“已经做完了某事”，还可译为：“用完了；不用了”。

例如：I have done with this pair of shoes.
这双鞋我已经穿完了。 = 这双鞋我不穿了。