老师鼓励我们要积极发言，不要害怕。

Lǎoshī gǔlì wǒmen yào jījí fāyán, búyào hàipà.

The teacher encourages us to speak up actively and not be afraid.

她在工作中非常积极。

Tā zài gōngzuò zhōng fēicháng jījí.

She is very active at work.

只要你保持积极的心态，就能慢慢进步。

Zhǐyào nǐ bǎochí jījí de xīntài, jiù néng mànman jìnbù.

As long as you keep a positive attitude, you can improve little by little.