RUP acknowledges four levels of testing: unit testing, integration testing, system testing, and acceptance testing.

RUP确定了四级测试：单元测试、集成测试、系统测试和验收测试。

youdao

The line between the two levels of testing can be blurry, and result in gaps if responsibilities are not clearly communicated.

两级测试的界限是模糊的，并导致责任的间隙没有传达清楚。

youdao

They must plan sufficient time for transition to production, various levels of testing, documentation, and so on, as shown in Figure 1.

他们必须设计过渡到产品的具体时间，测试的各种水平，以及文件等等，如图1所示。

youdao

Helen Murray Free invented self-testing equipment that lets diabetics measure their own blood levels of glucose at home.

VOA: special.2010.11.09

The force said it used the combined tactics of high levels of testing, and intelligence-led operations.

BBC: North Wales Police breath tests most drivers in Wales

Consult with those directly responsible for certification of the safety, reliability and effectiveness of the diminishing U.S. nuclear arsenal in order to obtain candid assessments uncompromised by perceived political considerations as to what levels of testing are required to make such certifications for the foreseeable future.

CENTERFORSECURITYPOLICY: Center for Security Policy | Testing, Testing: Is The Clinton Administration Determined To Gut The US Nuclear Deterrent?

While the job involves working with much higher voltage levels and different methods of testing equipment, he says he felt prepared for the role.

WSJ: Transitioning From the Military to Civilian Work