Rdna
abbr. recommended daily nutrient allowance 推荐每日营养素供给量
🗣️ 情景例句
I've been invited to give a talk at the conference.
我已受邀在大会上发言。
You're wasting you breath.
你在白费口舌。
What's the matter, children?
怎么啦，孩子们？