Compass: A thread safe instance used to open Compass Sessions for single thread usage.

Compass：为单线程使用，创建线程安全的实例来打开Compass Seesion。

youdao

Compass: A thread safe instance used to open Compass Sessions for single thread usage.

Compass：为单线程使用，创建线程安全的实例来打开Compass Seesion。

youdao