There was a sharp knock on the door.
敲门声大作。
You don't have to knock—just walk in.
不必敲门—进来就是了。
He rushed into the room without troubling to knock.
他连门也懒得敲就闯进屋去。
I was so involved in my book I didn't hear you knock.
我全神贯注在看书，没听到你敲门。
No sooner had I sat down than there was a loud knock on the door.
我刚坐下就有人大声敲门。
You should knock before you enter.
你进来前应先敲门。
Deeply involved in his book, he didn't hear my knock.
他沉浸于书本，没有听到我的敲门声。
Just when she was going to bed, there was a knock at the door.
正当她要上床睡觉时，有人敲门。
Ring the doorbell or knock at the door before you enter the room.
在你进入房间之前，按一下门铃或敲门。
They knock on their neighbours' doors and shout "trick or treat".
他们敲了他们邻居家的门，然后喊着“不给糖就使坏”。
If there is anything I can do for you, you just knock on my door.
如果有需要我帮忙的地方，直接敲我的门。
No sooner had she fallen asleep than she heard a knock at the door.
她刚睡着就听到了敲门声。
They waited in silence, and presently there came another lighter knock.
他们默默地等着，不一会儿，又传来了一阵比较轻的敲门声。
He hurt his shoulder not long ago, trying to knock ripe mangoes from a tree.
不久前，他试图把成熟的芒果从树上敲下来，弄伤了肩膀。
Pinocchio went straight to the Fairy's house, firmly resolved to knock at the door.
皮诺乔径直走到仙女家，打定主意要敲门。
There was another knock, and another fox was at the door who wished to woo Mrs Fox.
又响起了敲门声，另一只狐狸站在门口，想向狐狸太太求婚。
They had just finished their meal and resumed their arm-chairs, when there came a heavy knock at the door.
他们刚吃完饭，又坐到扶手椅上，这时，传来了重重的敲门声。
On Halloween, children would usually wear strange costumes, knock on their neighbours' doors and threaten them with "trick or treat".
万圣节的时候，孩子们会穿上古怪的服装去敲邻居的门，威胁他们说“不给糖就捣乱”。
He was scarcely awake when he heard the knock at the door.
他刚醒来就听见有人敲门。
咱们收工吃午饭吧。
I managed to knock him down to $400.
我设法让他把价格降到了400元。
You look fabulous—you'll knock 'em dead tonight.
你看上去漂亮极了—今晚肯定把他们迷倒。
If I get this report finished I'll knock off early.
如果我完成这个报告就会早点儿下班。
Be careful you don't knock your head on this low beam.
小心，别把头撞在这矮梁上。
I'm sure luck will knock at your door!
我相信幸运会敲你的门！
Chances didn't knock until I built a door.
直到我造了一扇门，机会才来敲门。
At that point there was a light knock on the door.
就在这时，有人轻轻地敲门。
Although I'm blind, I carry the lantern, not only light for others, but let others see me, so they won't knock me.
虽然我是盲人，但我提着灯笼，不仅是为别人照亮，而且让别人看到我，这样他们就不会撞到我了。
The knock-on effects are likely to include more warming, cloudier skies, increased precipitation and higher sea levels.
其连锁效应可能包括气温升高、云层增厚、降水量增加和海平面升高。
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