So I show that here, so in green, you have what's called a carboxcylic acid group, a c o o h, which gets converted by s o c l 2 to a c double bond o c l or an acid chloride.

我在这里用绿色表示，我们所说的羧酸族化合物，碳，氧，氧，氢，它被亚硫酰氯转化为,一个碳氧双键与碳氯单键组成的酰氯。

麻省理工公开课 - 化学原理课程节选

One of the results of that stimulation is that B-cells - a particular subset of B-cells - gets activated.

这种激活的结果之一就是,B细胞,一类特别的B细胞亚族被激活

耶鲁公开课 - 生物医学工程探索课程节选

The humoral immune response involves antibody production and antibodies are made by a subset of cells called B-cells.

体液免疫反应中包括抗体的产生过程,抗体是由一类称为B细胞的细胞亚族产生

耶鲁公开课 - 生物医学工程探索课程节选