You must act up to your promise.
你必须实践自己的诺言。
You must act up to your promise.
你必须履行自己的诺言。
The car's engine began to act up.
汽车的发动机开始出毛病了。
Please act up the dialogue in pairs .
请两人一组表演这个对话。
按你的信念办。
The car's engine is beginning to act up.
这辆车的引擎开始出毛病了。
Continually heavy rain made some rivers act up.
连续不断的大雨造成一些河流泛滥。
Watch Ricky.He sometimes likes to act up in class.
注意里基，他有时喜欢在课堂上捣乱。
Watch Ricky. He sometimes likes to act up in class.
注意里基，他有时喜欢在课堂上捣乱。
Sometimes they act up and force you to take a stand.
有时因为他们无理取闹或者强迫你表明立场。
What you say means very little unless you act up to it.
你要是说而不做，你的话就没有多大意思了。
"Look," he said to Cass, "you act up again and you're out."
“听着，”他跟卡丝说，“你再胡闹就出去。”
If the pressure is too low, the central heating system will act up.
如果压力太低，集中供暖系统就会出毛病。
The children started to act up as soon as the teacher left the room.
老师一离开教室，孩子们就闹起来了。
If you act up to your promise, we are going on cooperating with you.
如果你遵守你的诺言，我们将继续同你合作。
The bird said, I'm sorry for my behaviour and will never act up again.
小鸟说：“我很抱歉我的行为，我将不再这样做了。”
Narration is a basic speech act up on which people tell and retell their experience.
叙事是人类最基本的一种言语活动，是人们借以组织和重述人生经验的主要模式。
And American judges and lawyers deny (not always plausibly) that they act up for the camera.
而美国的法官和律师也不认为自己会因为摄像机而发挥失常，尽管这不总是可信的。
Much like a computer, we only have space for so much, until our own hard drive (mind) starts to act up.
就像一台电脑，除非电脑的硬盘坏了（这里是我们的大脑），否则会用空间来存储大量的信息。
But it also allows peaceful nationalists to act up, and voters to support them, because there is no danger of bloodshed.
但也让向往和平的民族主义者行动起来，让选民们支持他们，因为支持他们才不会有流血的危险。
Instead of having a rule that vaguely says, "Don't act up inthe store, " make it more specific by saying, "No whining, crying, yelling, screaming, complaining or screaming in the store."
于其模糊地说“不要在商店里这样表现”不如将其说的更加具体“不要在商场里抱怨，哭，叫喊，尖叫，埋怨” 。
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