* 你最漂亮的眼睛 (Nǐ zuì piào liang de yǎn jīng) translates to "Your eyes are the most beautiful."
* 我不得不笑 (Wǒ bù dé bù xiào) translates to "I can't help but laugh."
Therefore, the full translation of the phrase is:
"Your eyes are the most beautiful. I can't help but laugh."
This phrase is usually used to express amusement or a lighthearted teasing, often when someone is saying something endearingly silly or charming. The person is acknowledging the beauty of the other person's eyes while also playfully acknowledging the silliness of the situation.