由于表现不佳，公司决定将他的职位从经理降为普通员工。

Due to poor performance, the company decided to ___downgrade his position from manager to regular employee.

由于缺乏资金，公司不得不降低产品质量。

Due to lack of funding, the company had to ___downgrade the product quality.

这份报告的安全级别从机密降为内部使用。

The report was ___downgraded from 'Confidential' to 'For Internal Use Only'.

由于公司近期业绩下滑，分析师下调了该股票的评级。

Analysts ___downgraded the stock after the company's recent poor performance.