For patients with PE secondary to a transient (reversible) risk factor, we recommend treatment with a VKA for 3 months over treatment for shorter periods (Grade 1a).

暂时性(可逆性)危险因素继发pe患者，我们推荐VKA治疗疗程为3个月，而不是更短疗程(1 A)。

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This paper analyses and discusses the structural feature , forced condition , Safety Coefficient and effect factor of 50KW GRADE Wind turbine main axis system.

本文分析研究了50KW级风力发电机主轴系的结构特点、受力状况、安全系数及其影响因素。

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The result shows that there has been one type (or one grade) of every landscape factor which is dominating over the area of surrounding region of each city.

结果表明，在大多数城市周边地区，各侵蚀景观因子都有一种类型(或级别)，其面积分布系数较大，居支配地位。

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Is grade inflation an important factor in the decline in student work effort?

FORBES: The Three "I's" of Higher Ed Reform

The age of pupils can be another determining factor: under-age pupils are more likely to repeat a grade, while over-age pupils tend to leave school early.

UNESCO: MEDIA SERVICES