双生

shuāng shēng zi

双生子

twins

shuāng shēng jiě mèi

双生姐妹

twin sister

shuāng shēng xiōng di

双生兄弟

twin brother

shuāng shēng shuāng bāo tāi

双生双胞胎

twin pair

tóng luǎn hé yì luǎn shuāng shēng

同卵和异卵双生

monozygotic and dizygotic twins