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。
The young herdsman briskly mounted a horse that was inclined to act up with an unaccustomed rider.
年轻牧民轻快地跃上一匹惯于对生人使性子的马。
The researchers also found that chimps most often acted generously when the waiting partner reminded the chooser gently of her presence but did not act up or bully her into picking a treat for two.
研究人员还发现，当有同伴温柔地提醒自己在场，而非举止粗鲁或强迫它们挑选双份奖励时，黑猩猩多数时候举止慷慨。
They expect some high school students to act up but figure those who get to college will behave more maturely.
他们以为中学生会调 皮捣蛋，但觉得上了大学的人行为举止会成熟些了。
We all have experienced this strange phenomenon in our life: we know what is right but we cannot act up to it;
我们都在生活中体验过这种奇怪的现象：知道什么是对的，但做不到；
We all have experienced this strange phenomenon in our life: we know what is right but we cannot act up to it;
我们都在生活中体验过这种奇怪的现象：知道什么是对的，但做不到；
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