R&d
abbr. Research and Development 研究与开发
🗣️ 情景例句
Right over here, Grandpa.
请到这儿来 ，爷爷。
When did you do homework?
你什么时候做家庭作业？
And Chinese, Korean, Filipino and Indian engineers are graduating in droves from California's colleges.
中国、韩国、菲律宾和印度的工程师一批批地从加州的大学毕业。