南方周末记者 王瑭琳 南方周末实习生 冯筱雅
The hydrogel-based plug blocks a part of the heart to cut stroke risk and was shown to be effective in rats and a pig.
，更多细节参见PG官网
The Oversight Board is once again urging Meta to overhaul its rules around AI-generated content. This time, the board says Meta should create a separate rule for AI content that's independent of its misinformation policy, invest in more reliable detection tools and make better use of digital watermarks among other changes.
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