knocking
[nɒkɪŋ]
n.
爆震音，卡答卡答的故障声音;
v.
敲，击，打( knock的现在分词 );
（心）怦怦跳;
把…撞击成（某种状态）;
批评;
例句:
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They were knocking around together for about a year.
他们交往大概有一年了。
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He lied to me constantly and started knocking me around.
他经常对我撒谎而且开始打我。
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I was set to shut out anyone else who came knocking.
其他任何人来敲门，我都决意将其拒之门外。
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I am not in favour of knocking the banks.
来自THETIMES
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We're all addicted to "knocking through".
来自THETIMES
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But she never even considers knocking on the door.
来自WSJ