certification

证明，资质证书n.

• An employer can demand written certification that the relative is really ill.

  雇主可要求书面证明以证实这位亲属确实病了。

• Students would be offered on-the-job training leading to the certification of their skill in a particular field.

  学生将获得在职培训，他们也将因此得到在某一领域的技术合格证。

• The products had been certified by a third party when the certification was the company's own.

  这些产品是由第三方认证的，而实际上认证是该公司自己的。