They decided to knock up a table tennis match.
他们决定赶快安排一场乒乓球比赛。
Can you knock up a bed out of some old pieces of wood?
你能和几块旧木头拼凑成一张床吗？
The ability of some ecosystems to clean themselves up can also cause knock-on problems.
生态系统的自我净化能力也会引起连锁反应。
She would knock on the door and say, "Open up."
她敲门，说，“开门。”
I wanna knock those gates right now, and I will say sign us both up.
我想现在就去敲他们的门，我想告诉他们把咱俩都签了吧。
Then one day, when the mother had almost given up hope, there was a knock at the door.
一天，母亲几乎不抱任何希望时，传来了敲门声。两姊妹一起站在门前。
These children walk up to houses and knock on the doors.
这些孩子们走到屋前敲门。
What are we supposed to do-walk up and knock on the door?
我们还能干什么呢——走上前去敲门？
Life will knock us down, but we can choose whether or not to stand back up.
生活会把我们打趴下，但我们可以选择是否重新站起来。
Life will knock us down, but we can choose whether or not to stand back up.
生活会把我们打趴下，但我们可以选择是否重新站起来。
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