评级机构标准普尔昨天宣布将中国的主权信用评级展望从稳定调整为负面。

Standard and Poor's, the credit rating agency, has cut its outlook for China's sovereign credit ratings from stable to negative.

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实际应用表明，系统在无人值守情况下可自行调整并稳定调压器输出电压，可满足电子加速器调压器的精确控制和自动控制要求。

It is shown in practice that the system can adjust the variac output voltage automatically and assure the accurate and automatic control of the electronic accelerator.

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We establish these targets, we review them once a year, we don't make changes in many years, they're quite stable, and when we do move them we don't move them by a lot.

我们设定了这些资产配置,每年都会评估一次,这些指标已经很多年没有变过了,十分稳定,即使我们要调整,也不会有很大幅度

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