查询是计数器的集合，它是用自定义代码创建的，用于管理性能数据的集合。
A query is a collection of counters, created in your custom code, to manage the collection of performance data.
同时这个应用还可以使用二维码自动安装，支持多账户和基于代码生成的时间和计数器。
This app features automatic setup via QR code, support for multiple accounts and has time and counter based code generation.
要递增一个加锁的计数器仍然需要编写很多代码！
That's still a lot of code just to increment a counter with a lock held!
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