Doesn't respond as well to killed vaccines, and that's why the Salk vaccine has to be injected at a high dose.

但却对灭活的疫苗没有那样强烈反应,这也是索尔克氏疫苗为何,必须大剂量注射的原因

耶鲁公开课 - 生物医学工程探索课程节选

Now, the polio vaccine that Salk produced was very effective, but it required a fairly large dose of the vaccine and it had to be injected into the arms of children.

索尔克生产的小儿麻痹症疫苗效果显著,但是,该疫苗的单支注射剂量非常大,而且必须通过小孩的手臂进行注射

耶鲁公开课 - 生物医学工程探索课程节选

Because of that large amounts of particular types of pesticides and fertilizers and the like have to be used to defend against these outside threats; and those bring their own series of environmental consequences, so we'll go into that in some detail.

由于上述原因,人们大剂量使用某些,杀虫剂和化肥,这样做是为了抵御外来威胁,这带来了一系列的环境影响,我们来详细看看是怎么回事

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The other pathway that I think is very promising is now to use stem cell generated cells in culture dishes to use them for high throughput drug screening now we can test thousands of different drugs without killing so many animals.

第二个目标的前景相当广阔,我们可以用干细胞,在培养皿中大量繁殖各种细胞,用于大剂量的药物试验,让你无需屠戮动物,就能进行各种药物试验。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选