词汇	bed contraction
释义	bed contraction 滤床收缩
随便看	knock on/at the door knock-on cascade knock-on certainty knock-on collision knock on damage knock-on damage knock-on direct interaction knock on displacement knock-on displacement knock on doors knock one back knock on effect knock-on effect knock -on effect knock-on effects knock on electron knock-on electron knock one over knock one's block off knock oneself out Knock oneself out on something knock oneself out preparing for the experiment knock oneself out to get through the difficulty knock oneself out with excessive work knock one's head against