Number + 颗 + Noun
颗 (kē) is a measure word used to count small, round, or grain-like objects. Common nouns paired with 颗 include stars (星), teeth (牙), seeds (种子), and hearts (心). It emphasizes the compact, spherical shape of the item being counted.
她掉了一颗牙,笑起来特别可爱。
tā diào le yī kē yá, xiào qǐlái tèbié kě'ài.
She lost a tooth, and her smile looks especially cute.
我在海边捡了好几颗漂亮的石头。
wǒ zài hǎibiān jiǎn le hǎo jǐ kē piàoliang de shítou.
I picked up quite a few pretty stones at the beach.
这颗糖是草莓味的,你要不要尝尝?
zhè kē táng shì cǎoméi wèi de, nǐ yào bú yào chángchang?
This candy is strawberry-flavored; do you want to try it?