Occurring sequentially from top to bottom, within each iteration, r, d, c, and t represent some of the standard disciplines executed in each iteration (Requirements, Design, Code, and Test).

在每个迭代中从上到下顺序发生的R、D、c和t表示在每次迭代中执行的一些标准规程(需求、设计、代码和测试)。

youdao

And that's on top of the handful that are already available from Sprint and T-Mobile.

Sprint和t - mobile已经提供少数支持4g的服务。

youdao

It grows from the ground up. We don't impose regulations from the top down.

VOA: special.2010.06.16

The most profound changes, the most dynamic innovations, they don't happen from the top down -- they happen from the bottom up.

WHITEHOUSE: President Obama Addresses Business and Tourism Leaders

That certainly was the uber political message coming out of the White House, even if it wasn't a directive from the top of the IRS. Another question is who stopped the "inappropriate" requests once they were discovered.

WSJ: Review & Outlook: The IRS Targets Conservatives

Don't hold your breath, the latest and greatest Phenom II still can't steal the spotlight from Intel's spectacular top-of-the-line Core i7-980X, but if prices actually matter to you, you'll wanna read on.

ENGADGET: AMD's 3.2GHz hexacore Phenom II X6 1090T comes out for a review roundup