R and D

常见例句

And I've found some good people for R and D, too.
我也替研发部门找了些好人才。
Lester: Yes, I've started, and I've found some good people for R and D.
雷斯特：对，已经开始了，而且我也找到几个不错的研发人员。
Kevin: I agree, but remember, our investors may see R and D costs as money spent without the possibility of an immediate return.
凯文：我同意，不过要记住，我们的投资商可能会将研发成本视为无法立即取得回报的投资。

The American Food and Drug Administration says R.F.I.D.tags act like an electronic safety net to make it easier to catch counterfeits.
So if we want to talk about the volume of that, we just talk about the surface area, which is 4 pi r squared, and we multiply that by the thickness d r.
如果我们要讨论它的体积，我们要用的是表面面积，也就是４πｒ的平方，乘以厚度ｄｒ
麻省理工公开课 - 化学原理课程节选
The most important result from last time was that if you took this r, and you took two derivatives of this to find the acceleration, d^2 r over dt^2, try to do this in your head.
上节课最重要的结论,就是如果你把 r 写成这样,对 r 求两次导就能得到加速度,d^2 r / dt^2,心算一下
耶鲁公开课 - 基础物理课程节选

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