You've got a baby brother and a baby sister.

你有一个小弟弟和一个小妹妹。

youdao

Son: I'm still fine. Why did you give me a baby sister?

儿子：我也好好的，可你为什么给我生了一个小妹妹？

youdao

A baby sister Nurse: Don't you like your new baby sister, Johnnie?

小妹妹保育员：约翰尼，你难道不喜欢你的小妹妹吗？

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Her only hope is a baby sister who was genetically engineered to help save the older girl's life.

VOA: special.2009.06.12

The sister must leave the safety of home to rescue the baby from a strange and dream-like world.

VOA: special.2009.10.05

For example, "Outside Over There" is about a baby who is kidnapped by goblin creatures while her older sister is not paying attention.

VOA: special.2009.10.05

The researchers said the probability of the younger sister having a teenage pregnancy went from one in five to two in five if the elder sister had a baby as a teenager.

BBC: Teenage pregnancy is 'contagious'

Mr Prowse, who was adopted as a baby, said finding his sister so near was "quite a shock".

BBC: Man finds long-lost sister at local Penzance football club

Professor Propper said an elder sister with a baby could also influence the decision to keep a baby.

BBC: Teenage pregnancy is 'contagious'