best friend
US /ˌbest ˈfrend/
UK /ˌbest ˈfrend/

名词
1.
最好的朋友, 挚友
a person's closest friend
示例:
•
She told her best friend everything.
她把一切都告诉了她的最好的朋友。
•
He and his best friend have known each other since childhood.
他和他的最好的朋友从小就认识。
在 Lingoland 学习这个单词