It's not yet clear why researchers decided to point Webb in its direction, but little is known about the nebula, including the mass of the star creating it. That matters because a more massive star could eventually explode as a supernova, while a smaller, sun-like star would keep shrugging off layers of material until only a dense core remains and cools over time.
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，详情可参考safew官方版本下载
L3因为是人车共驾，责任划分、保险赔付等方方面面都需要考虑到。而L4不存在这个问题，出了事就是厂家负责。因为责任明晰，所以落地争议也较少，这就是现状。但是只要法律层面解决L3的责任划分问题，大规模普及也并不是遥遥无期。
Around 200 of these hands are in use, mostly by researchers at universities and tech firms.
Ранее в российских книжных магазинах начали запрещать продажу книги «Левая рука тьмы» писательницы Урсулы Ле Гуин. По информации источника, сразу в нескольких регионах страны сотрудники полиции пришли с требованием снять книгу с продажи.