R&d
abbr. Research and Development 研究与开发
🗣️ 情景例句
That's a good idea.
这是个好主意。
He that walks with wise men should be wise.
与智者行即得其智。
There is only enough spring water to supply the needs of the houses, so we have to pump from the river for farm use.
泉水只能满足家庭生活用水，因此我们必须从河里抽水以用于农业生产。