eighty

八十

He counted to eighty before opening his eyes again.

他數到八十才再把眼睛張開。

八十歲、八十幾歲常用複數

My grandmother still swims every morning in her eighties.

我奶奶八十幾歲了，每天早上還是會去游泳。

八十的、八十個

Eighty students signed up for the summer exchange program.

有八十名學生報名參加暑期交換計畫。