To say "尝一尝" in English, you can say "taste a little" or "try a bite." The phrase "尝一尝" comes from the Chinese language and is used to invite someone to sample a small amount of food or drink. Here are some examples with English translations:

快点尝一尝这个蛋糕，它很好吃。 (Kuaì diǎn cháng yī cháng zhè gè dàn gāo, tā hěn hǎo chī.) - Try a bite of this cake, it's delicious.

来尝一尝我做的新菜，我想听听你的意见。 (Lái cháng yī cháng wǒ zuò de xīn cài, wǒ xiǎng tīng tīng nǐ de yì jiàn.) - Come and taste a little of the new dish I made, I want to hear your opinion.

请尝一尝我的咖啡，我特地给你煮了一杯。 (Qǐng cháng yī cháng wǒ de kā fēi, wǒ tè dì gěi nǐ zhǔ le yī bēi.) - Please taste a little of my coffee, I made a special cup for you.