be sworn brothers

• 结拜

be sworn brothers的用法和样例：

例句

1. Xiao Zhang and Xiao Wang became sworn brothers because of their affection.
   小张和小王因为感情好而结拜为异姓兄弟。
2. The two best friends burnt incense and swore to be brothers in the way ancient people did.
   他俩是极好的朋友，也学着古人的样子焚香结拜了兄弟。