update readme

README.md

@@ -12,10 +12,10 @@ DelayQueue is a message queue supporting delayed/scheduled delivery based on red
 
 Core Advantages:
 
-- Support ACK/Retry mechanism, it will re-deliver message after a while as long as no confirmation is received. As long as Redis doesn't crash, consumer crashes won't cause message loss.
-- Works safely in a distributed environment, you could deliver message to same queue or consume message from same queue at multiple machines.
-- A message will be consumed by one and only one consumer.
-- Consumers control the flow of messages, NO NEED FOR ANY OTHER MIDDLEWARES except redis.
+- Guaranteed at least once consumption
+- Auto retry failed messages
+- Works out of the box, Config Nothing and Deploy Nothing, A Redis is all you need.
+- Natively adapted to the distributed environment, workers can be added, removed or migrated at any time
 
 ## Install
 

README_CN.md

@@ -8,10 +8,10 @@
 DelayQueue 是使用 Go 语言基于 Redis 实现的支持延时/定时投递的消息队列。
 
 DelayQueue 的主要优势：
-- 支持 Ack/重试机制，只要消费者没有确认成功消费 (Ack) DelayQueue 就会尝试重新投递消息，直到达到最大重试次数为止。只要 Redis 不崩溃就不会丢失消息。
-- 可在分布式环境中安全运行，用户可以在多台机器上同时向 DelayQueue 发送或拉取消息。
-- DelayQueue 保证一条消息有且只有一个消费者进行消费。
-- 消费者负责控制消息流转，无需部署额外服务。
+- 保证至少消费一次(At-Least-Once)
+- 自动重试处理失败的消息
+- 开箱即用, 无需部署或安装中间件, 只需要一个 Redis 即可工作
+- 原生适配分布式环境, 可以随时增加、减少或迁移 Worker
 
 # 安装