本报北京2月25日电 （记者彭波）十四届全国人大常委会第二十一次会议25日下午在北京人民大会堂举行第一次全体会议。赵乐际委员长主持。
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You can also use an arbitrary block as a filter:
All of the robovacs I've tested have announced out loud when they're in remote viewing mode. But not all robot vacuums provide that courtesy notification (the DJI Romo, for one, does not).