2.knock out与knock up都表示“筋疲力尽”，有区别吗？

knock out
1. 击倒
Jack knocked his opponent out in the second round of the contest.
杰克在比赛的第二回合就把对方击倒了。
2. 使昏迷
The drug knocked him out.
麻醉毒品使他昏迷了。
3. 淘汰
Our team was knocked out in the second run.
我们的队在第二轮比赛中被淘汰。

knock up
1. (使)筋疲力尽
The long journey knocked them up.
长途旅行把他们累坏了。
2. 赚得
His father knocked up over 30000 dollars last year.
他父亲去年挣了三万多美元。