asgiref异步同步解释 #https://github.com/django/asgiref/blob/master/asgiref/sync.py 类异步同步： """ 实用程序类，该类打开仅在具有 将事件循环转换为在子线程中工作的同步可调用事件。 如果调用堆栈包含异步循环，则代码将在那里运行。 否则，代码将在新线程中的新循环中运行。 ###############不明白#################### 无论哪种方式，该线程都会暂停并等待运行任何线程 在调用之前，使用SyncToAsync从调用堆栈的下一层调用代码 一旦异步任务返回，最后退出。 """

谁能帮我解释一下黑体字？提前谢谢

# https://github.com/django/asgiref/blob/master/asgiref/sync.py
class AsyncToSync:
    """
    Utility class which turns an awaitable that only works on the thread with
    the event loop into a synchronous callable that works in a subthread.

    If the call stack contains an async loop, the code runs there.
    Otherwise, the code runs in a new loop in a new thread.
    
    ###############  DON'T UNDERSTAND ####################
    Either way, this thread then pauses and waits to run any thread_sensitive
    code called from further down the call stack using SyncToAsync, before
    finally exiting once the async task returns.
    """