Creating a composite application that increases productivity is your primary goal, but we all know that applications are not static and must always adapt to the changing needs of business.

您的主要目标是创建提高生产力的复合应用程序，但是我们都知道，应用程序不是静态的，并且必须总是随业务需求的变更而变化。

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Multiple attributes in the entity may be combined to form a composite primary key.

实体中的多个属性可以组合成一个复合的主键。

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You can also create a primary key class for entities that have composite keys.

还可以为具有组合键的实体创建一个主键类。

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At 10 days the primary efficacy measure (a composite of asymptomatic proximal DVT, symptomatic DVT, symptomatic non-fatal PE, and VTE-related death) had occurred in 2.7% of patients in each group.

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After 4.8 years of follow-up a primary endpoint event (the composite of MI, stroke, and death from CV causes) occurred in 3.8% of patients in the Mediterranean diet extra-virgin olive oil group, 3.4% in the Mediterranean diet with nuts group, and 4.4% of patients in the control group.

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Some scouting and musing revealed three primary causes of increased complexity of composite applications.

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