foster brother的音標是["f?st?(r) "br??t(?)r]，翻譯為“養兄弟”。

速記技巧：foster可以分解為fost和er，分別代表養育和兄弟的意思。brother可以代表兄弟。整體可以理解為通過養育而形成的兄弟。

Foster brother的英文詞源是“foster”，意為“養育”或“收養”，而“brother”意為“兄弟”。

foster brother的變化形式有復數形式：foster brothers，過去式：fostered，過去分詞：fostered。

相關單詞有：adoptive father養父，adoptive mother養母，adopted brother養兄弟，adopted sister養姐妹，foster home養育家庭，foster care養育，撫養，養育，養父養母等。其中，“foster care”指的是收養或養育孩子的情況，是一種社會福利制度。這些單詞都反映了收養或養育兄弟姐妹這一社會現象。

總之，foster brother作為一個詞組，可以表示收養的兄弟，其英文詞源和變化形式以及相關單詞都反映了社會文化和家庭關系等主題。

常用短語：

1. foster brothers and sisters

2. raise together

3. share experiences

4. support each other

5. be close friends

6. have a bond

7. grow up together

例句：

1. They were foster brothers and sisters who shared many happy memories together.

2. They supported each other through thick and thin, and became close friends.

3. The two foster brothers grew up together, playing sports and having fun in the sun.

4. They have a bond that cannot be broken, even though they live far away from each other.

5. The foster brothers always had a special bond, even though they were raised by different families.

6. They shared experiences and supported each other through their journeys in life.

7. Foster brothers and sisters are very close, and they always have each other"s backs.

英文小作文：

My Foster Brothers and Sisters

I have many wonderful memories of my foster brothers and sisters. We shared many happy moments together, playing games, going on adventures, and laughing until we cried. We supported each other through thick and thin, and became close friends. Our bond was unbreakable, even though we lived far away from each other. Today, I still keep in touch with them, and we always have each other"s backs when we need support. Our experiences together have taught me the importance of having close friends and supporting each other in life. I am grateful for my foster brothers and sisters, and the wonderful memories we created together.