R&d
abbr. Research and Development 研究与开发
🗣️ 情景例句
Well, I really wouldn't want to move, but ...
噢， 我实在不愿意搬家 ，但是……
I ask him to take this medicine.
我要求他吃药。
Can you ring me back right away?
你能立刻回个电话吗？