He burst into the room without knocking.

他没敲门就闯进了屋子。

《牛津词典》

He marched into the kitchen without knocking.

他没敲门就快步走进了厨房。

《柯林斯英汉双解大词典》

I entered without knocking.

我没有敲门就进去了。

youdao

I climbed the stairs to his apartment and went in without knocking.

VOA: special.2011.06.18

We knew that at any moment, a cousin, aunt, grandmother or stray friend might walk through out front door without knocking.

NPR: Becoming More American Than Cuban

Made of mesh, it mounts to a door so that cats can reach new heights without knocking over books or priceless antiques.

WSJ: Cat-Product Entrepreneurs Stay Steps Ahead of the Copycats

Like Vioxx, it is an arthritis drug that works by inhibiting the enzyme known as COX-2, without knocking out another enzyme called COX-1.

FORBES: Magazine Article