同 + 一 + Measure Word + Noun
同 (tóng) means "same," "identical," or "together with." It is used to indicate that two or more things share a common quality or belong to the same category. It appears frequently in formal writing and compound words like 同一 (the same) and 同时 (at the same time).
我们两个的想法完全相同,太默契了。
wǒmen liǎng gè de xiǎngfǎ wánquán xiāngtóng, tài mòqì le.
Our ideas are exactly the same — we're so in sync.
他和我同一年出生,但比我大两个月。
tā hé wǒ tóng yì nián chūshēng, dàn bǐ wǒ dà liǎng gè yuè.
He was born in the same year as me, but two months earlier.
这两件衣服颜色相同,款式不一样。
zhè liǎng jiàn yīfú yánsè xiāngtóng, kuǎnshì bù yíyàng.
These two pieces of clothing are the same color but different in style.