有的时候他们很调皮：我听说有个家伙把我的书挖空做了一个安全钥匙。

Once in a while they're naughty: I did get word of a fellow who'd made a key safe by hollowing out one of my books.

youdao

后来我又给校长派克写了一封信，告诉他们我已经教了你们快两年，我非常了解你们，你们虽然有些调皮，但是你们绝对不是坏孩子，你们很坦诚，学习很努力，斯小姐指控的不是你们的故意行为……因此，我想你们不必再担心什么了！

You guys are honest and hardworking. Ms. S's accusations aren't characteristic of you two…Therefore, I don't think you guys will have anything to worry about.

youdao

我是一个开朗活泼的小女孩，虽然有时较为调皮，但和同学老师相处得还是很融洽的，他们都很喜欢我。

I am a cheerful and lively little girl, although sometimes more mischievous, but get along with teachers and students is still very cordial, and they liked me.

youdao