Test and quality assurance.

测试和质量保证。

Level 4: Testing and Quality assurance.

四级：测试和品质保证。

Apply quality assurance to traceability as well.

对追溯性应用质量保证。

We now have a new Quality Assurance programme.

我们现在用的是一套新的质保程序。

Adherence to an improved quality assurance process.

遵守改进的质量保证过程。