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user_entry_before_sleep_imp 这个函数描述的是在进入休眠前调用，请问是只有刚开机的时候调用一次，还是每次唤醒后再进休眠每次都会调用一次。我在里面加了打印，只有刚开机的时候进休眠会打印，后面唤醒后就不再打印了，不知道后面是进休眠了没