adj.未经证明的；无证书的

The uncertified mechanic was unable to fix the car properly.
这位未经认证的机械师无法正确修理汽车。
She applied for the job but was told she needed certification before being hired.
她申请了这份工作，但被告知在被雇佣前需要获得认证。
The restaurant's food safety standards were not up to certified levels.
餐厅的食品安全标准未达到认证水平。
The uncertified electrical work in the house posed a significant risk of fire.
房子里未经认证的电气工作存在引起火灾的重大风险。
He didn't pass the exam, so his certification application was denied.
他没有通过考试，因此他的认证申请被拒绝了。
The company only hires certified professionals to ensure quality service.
公司只聘请有认证的专业人士以确保服务质量。
The uncertified software was full of bugs and crashes frequently.
该未经认证的软件充满了错误，经常崩溃。
The uncertified gym equipment could be dangerous if used improperly.
使用不当，未经认证的健身房设备可能会很危险。
The uncertified teacher struggled to manage the classroom effectively.
该未经认证的教师在有效地管理课堂方面遇到了困难。
They decided to hire an uncertified worker because they couldn't afford a certified one.
他们决定雇用一个未经认证的工人，因为他们负担不起认证工人的费用。