自定义异步操作

¥Custom asynchronous operations

上面简单的异步工作 API 可能并不适用于所有场景。使用任何其他异步机制时，需要以下 API 来确保运行时正确跟踪异步操作。

¥The simple asynchronous work APIs above may not be appropriate for every scenario. When using any other asynchronous mechanism, the following APIs are necessary to ensure an asynchronous operation is properly tracked by the runtime.