Start by determining the smallest unit of a test cycle that you would bother to track.

首先决定一个测试周期的最小单元。

youdao

The track system trolley features a unique dovetail mounting design which securely holds the power unit base in position for maximum accuracy.

独特的雁尾槽设计，使得轨道系统牢固地托起动力单元座，使切割精度大大提高。

youdao

The Economist Intelligence Unit, our sister company, created a city-level index to track the relation between housing prices and incomes across China.

我们的兄弟公司，经济学人智库开发了一个基于城市层面的指数，它可以追踪中国房价与收入的关系。

youdao

The NYPD has already launched a social media unit to track criminals on Facebook and Twitter.

FORBES: The Rise of Crime-Sourcing

And that violent offender unit has an excellent track record, and we think that we're going to continue to have success in that area.

NPR: Criticism Rises for New Orleans DA

But it also had some non-original parts, including Model A cranks and rods, an overhead valve unit built for 1920s dirt-track racing and dual carburetors from the 1930s.

FORBES: Flivver Beats Hummer