妹妹 is the word for "sister" in Chinese. 爱美 means "beauty-loving" or "beauty-conscious". Therefore, "爱美的妹妹" can be translated to "beauty-loving sister" in Engpsh.

The word "sister" comes from the Old Engpsh word "sustre", which was derived from the Proto-Germanic word "swestēr". "Beauty-loving" comes from the Engpsh words "beauty" and "loving", which are derived from the Old Engpsh words "beþie" and "lufu" respectively.

Here are some example sentences in Engpsh:

My beauty-loving sister always spends a lot of time getting ready in the morning.
My sister loves trying out new beauty products and giving herself mini makeovers.
My beauty-conscious sister is always giving me tips on how to take care of my skin and hair.

Here are the corresponding translations in Chinese:

我妹妹总是花很多时间在早上的打扮上。
我妹妹喜欢试用新的美容产品，给自己做小改造。
我妹妹总是给我护肤护发的小建议。