knock at是什么意思？

Knock at my window at eight o'clock and I'll be ready.8点钟敲我的窗，我会准备好的。There was a light knock at the door.有人在轻轻地敲门。They heard a knock at the front door.他们听到前门有人敲门。...

knock at的音标：knock at的英式发音音标为：[nɔk æt]knock at的美式发音音标为：[nɑk æt]...