A half-sister is a sister who shares only one of your parents. You have the same mother but different fathers, or the same father but different mothers.

A half-sister is half-sister 是 who shares only one of your parents只和你共有其中一位家長的 a sister姊妹。 You have the same mother你們同一個媽媽 but different fathers但爸爸不同， or the same father或同一個爸爸 but different mothers但媽媽不同。

You are still blood family. “Half” here does not mean she is only half a sister in love, in law, or in the home. It only means the blood line meets on one side, not both.

You are still blood family你們仍然是有血緣的家人。 "Half" here does not mean這裡的 "half" 不是說 in love, in law, or in the home在感情上、法律上或家裡， she is only half a sister她只算半個姊妹。 It only means它只是說 the blood line血緣 meets on one side, not both在一邊相接，而不是兩邊。

This is different from a stepsister: a stepsister comes when a parent marries someone who already has a daughter; there is usually no shared parent by blood.

This is different from a stepsister這和 stepsister 不同： a stepsister comes繼姊妹的出現， when a parent marries是家長娶了或嫁了 someone who already has a daughter一個本來就有女兒的人； there is usually no shared parent by blood通常沒有血緣上共同的家長。

Though actually, families do not always say the tidy word. Many people just say “my sister,” and only add “half” when they need to explain the family tree. It is ordinary family English, not a rude label — but you should follow what the family themselves say.

Though actually不過其實， families do not always say家人們不見得會用 the tidy word這個分得清清楚楚的字。 Many people just say很多人就說 "my sister,"我姊姊、我妹妹， and only when they need to explain the family tree只有需要把家族關係講清楚時， add "half"才會加上 "half"。 It is ordinary family English這是普通的家庭用語， not a rude label不是失禮的標籤—— but you should follow但你最好還是跟著 what the family themselves say這家人自己的說法。