R&d
abbr. Research and Development 研究与开发
🗣️ 情景例句
You took the words right out of my mouth.
我的话让你先说出来了。
David would get up early in the morning to deliver newspaper.
戴维一早起床就去送报纸。
runs the gentle slope of the continental shelf, geologically part of the continents.
从地质学上来说，它是大陆的一部分。