zhè / duì / tóng / luǎn / shuāng / bāo / tāi / zhǎng / de / fēi / cháng / xiàng / jī / hū / fēn / bu / qīng / shéi / shì / shéi

这对同卵双胞胎长得非常像，几乎分不清谁是谁。

This pair of identical twins looks so much alike that it's almost impossible to tell them apart.