他掉了一颗牙齿。

Tā diào le yì kē yáchǐ.

He lost a tooth.

天上有一颗星特别明亮。

Tiānshàng yǒu yì kē xīng tèbié míngliàng.

There’s a star in the sky that’s especially bright.

这颗苹果又大又红。

Zhè kē píngguǒ yòu dà yòu hóng.

This apple is big and red.