R&d
abbr. Research and Development 研究与开发
🗣️ 情景例句
I'm glad to meet you.
很高兴认识你。
Good-bye, cruel world.
永别了，残酷的世界啊。
When he returned to India he spoke in public about the situation in South Africa.
当他加到印度之后，他还就南非的形势公开发表演说。