构建块（一）
Building blocks
通过标准HTTP或gRPC api访问模块化最佳实践
Modular best practices accessible over standard HTTP or gRPC APIs
构建块是一个HTTP或gRPC API，它可以被代码调用，可以使用一个或多个Dapr组件。
A building block is an HTTP or gRPC API that can be called from your code and uses one or more Dapr components.
构建块解决了构建具有弹性的微服务应用程序的常见挑战，并编制了最佳实践和模式。Dapr由一组构建块组成，并支持新构建块的扩展。
Building blocks address common challenges in building resilient, microservices applications and codify best practices and patterns. Dapr consists of a set of building blocks, with extensibility to add new building blocks.
下图显示了构建块如何公开从代码调用的公共API，使用组件实现构建块的功能。
The diagram below shows how building blocks expose a public API that is called from your code, using components to implement the building blocks’ capability.
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