R&d
abbr. Research and Development 研究与开发
🗣️ 情景例句
Your family or the public?
你的家人还是公众
He who has health, has hope, and he who has hope, everything.
身体好就有希望，有希望就有一切。
I think you'd better fly somewhere in the west.
我认为你最好先飞到西部的一个地方。