我应该敲
I should knock.
以上为机器翻译结果，长、整句建议使用 人工翻译 。
所以，我拿了个小锤子敲我伸缩喇叭的伸缩端把它敲陷下去了这样就伸缩不起来了(我想我那时应该是想去打鼓吧~)。
So, I took a small hammer and dented the slide of the trombone enough so that it wouldn't slide (I guess I really wanted to play drums!).
youdao
请原谅。我想我应该先敲一下门的。
I beg your pardon. I suppose I should have knocked.
他应该来见我，来敲我的门。
He should be coming to see me, knocking on my door.
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