R&d
abbr. Research and Development 研究与开发
🗣️ 情景例句
I think she has a stomachache.
我想她肚子痛。
Do you want to change before the banquet?
宴会前你想换衣服吗？
The students followed Uncle Wang to see the other machine.
学生们跟着王大叔去看另一部机器。