同一

我们住在同一栋楼里。

Wǒmen zhù zài tóngyī dòng lóu lǐ.

We live in the same building.

他们在同一天出生。

Tāmen zài tóngyī tiān chūshēng.

They were born on the same day.

同一个问题，不同人有不同的看法。

Tóngyī gè wèntí, bùtóng rén yǒu bùtóng de kànfǎ.

Facing the same problem, everyone has a different opinion.