2 sentences for 小妹 (xiǎo​mèi)

1. 他是家里最大的，最疼爱他的小妹。

   tā shì jiā​lǐ zuì dà de, zuì téng'ài tā de xiǎo​mèi.

   He is the eldest in the family and dotes on his youngest sister.

   Source: Dong Chinese Dictionary

2. 她在一家事务所当小妹，负责跑腿和打杂。

   tā zài yī jiā shì​wù​suǒ dāng xiǎo​mèi, fù​zé pǎo​tuǐ hé dǎ​zá.

   She works as an office girl at a firm, handling errands and odd jobs.

   Source: Dong Chinese Dictionary