三人行，必有我师(焉)

语法
毕竟 "after all"
https://resources.allsetlearning.com/chinese/grammar/Expressing_%22after_all%22_with_%22bijing%22

词汇
换, change (pinyin in tags)
https://mandarinbean.com/new-hsk-2-word-list/

Guardian:
毕竟我只是个普通人， after all, I'm just an ordinary person
祖马现在已经成年，但我毕竟是他姐姐。Zu Ma is grown now, but after all I'm his big sister.
如果有一刻我必须拿我的伤来换大家的命呢, if at some point I have to turn my injuries into survival for everyone

Me:
虽然她打网球打得那么好，但毕竟还是个孩子，不太生她的气。
换药都没有效果。