構建塊（一）
Building blocks
通過標準HTTP或gRPC api訪問模塊化最佳實踐
Modular best practices accessible over standard HTTP or gRPC APIs
構建塊是一個HTTP或gRPC API，它可以被代碼調用，可以使用一個或多個Dapr組件。
A building block is an HTTP or gRPC API that can be called from your code and uses one or more Dapr components.
構建塊解決了構建具有彈性的微服務應用程序的常見挑戰，並編制了最佳實踐和模式。Dapr由一組構建塊組成，並支持新構建塊的擴展。
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.
下圖顯示了構建塊如何公開從代碼調用的公共API，使用組件實現構建塊的功能。
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.
