同 一

identical; the same

例句

你们俩在同一所学校？

nǐ men liǎ zài tóng yī suǒ xué xiào?

Do you guys go to the same school?

我和见次去同一间学校。

wǒ hé jiàn cì qù tóng yī jiān xué xiào.

I go to the same school as Kenji.

节日和考试碰巧在同一天。

jié rì hé kǎo shì pèng qiǎo zài tóng yī tiān.

The date of the festival coincides with that of the exam.

出现在

同一个世界，同一个梦想tóng yī gè shì jiè , tóng yī gè mèng xiǎngOne world - one dream, motto of 2008 Beijing Olympic games 同一挂tóng yī guà(coll.) to have a lot in common (with sb)性同一性障碍xìng tóng yī xìng zhàng àigender identity disorder