tracing.enable()
启用此 Tracing 对象，用于 Tracing 对象涵盖的类别集合。
🌐 Enables this Tracing object for the set of categories covered by the
Tracing object.
启用此 Tracing 对象，用于 Tracing 对象涵盖的类别集合。
🌐 Enables this Tracing object for the set of categories covered by the
Tracing object.