超百万点击的关于自然免疫力的强大辩论：参议员指责卫生部长无科学医学专业背景却强制新冠感染康复者也打疫苗（中文字幕）
疫苗免疫与自然免疫以及相互如何结合的背后，是两种抗新冠疫情路线的对垒。前者是以色列为代表的先行的人类新冠疫苗试验场，后者是瑞典群体免疫策略能成功的科学基础。在国会听证会上，有杜克MD背景的参议员保罗，问询斯坦福法学院毕业但无科学医学专业训练的卫生部长贝塞拉，为何打破历史和科学惯例，强制新冠感染康复者也接种疫苗。
参议员揪住部长的背景攻击他才是不懂科学，加傲慢专制；部长则要捍卫拜登政府班子的抗疫选择，为强制疫苗辩护。这是经典的政客之间上演的博弈，强大的辩论功底，牵涉万千人健康和生活的内容，让此场国会问讯累计引发百万美国人观看的兴趣。
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A low wall thickness and volume, to attain a uniform and shorter cooling time since a small quantity of hot plastic is allowed to cool. As a rule precision machining of thumb, the wall thickness of the half should be stored at a minimal of 6 mm. Learn extra in regards to the manufacturing process in ourStarter Guide to Injection Molding. It is essential that the melted materials is evenly delivered throughout the mold as usually occasions there may be} a couple of cavity within the mold allowing for the production of a couple of half at a time. Therefore, the mold shape should be designed in a way that ensures this, similar to by having runners of the identical dimensions.
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