Bfk
abbr. Becker-Fulde-Keller theory 贝克尔-富尔德-凯勒理论; bovine fetal kidney 牛胎肾
🗣️ 情景例句
You don't know what you are talking about.
你不知道你在说什么。
Practice is better than precept.
身教胜于言教。
and see that nothing particularly alarming is happening to its companions.
并且看到自己的同伴身上没有发生让自己担惊受怕的事。