as well as 如果相当于and,为什么不直接用and.它和and有啥不同吗?比如这句话many T cells

as well as ① 和，也，不仅…而且…
The tomb contained more treasure than any of us had ever seen before, as well as the mummy of the king. (Line 17)
这个陵墓含有的宝物比我们任何人先前所见过的都要多，还有国王图坦卡蒙本人的木乃伊。
他除了给我忠告外，还给我钱。
He gave me money as well as advice.= He gave me advice, and money as well.
孩子们既聪明伶俐又富有冒险精神.
The children are adventurous as well as bright.
The children are bright, and adventurous as well.
注意：A as well as B前后成分一致，可以是名词、形容词、介词短语等。
as well as ② 除…以外; 还…; 和…一样也…
=besides/with (注意：谓语动词由as well as前面的
名词决定)
The teacher, as well as the students, wishes for a holiday.
=not only…but also…
Not only the teacher but also the students wish for a holiday.
as well as ③ 用作连词引出比较从句，其义为“和…一样好”
 He speaks Spanish as well as I．
他说西班牙说得和我一样好。
 She sings and paints as well as playing the piano.
 as well是副词短语，其义为“也”，相当于too，通常用于肯定句或疑问句，一般不用于否定句，且通常放在句末，有时和连词and或but搭配使用。
 He is a worker, and a poet as well．
他是工人，也是诗人。
 Mr Liu can speak English，but he can speak Cantonese as well．
刘先生会说英语，但他也能讲广东话。
 The children are adventurous as well as bright.
=The children are bright, and adventurous as well.
孩子们既聪明伶俐又富有冒险精神。
我就只能讲到这份上了。。。希望可以帮到你

意思是一样，但强调的不一样
and强调两者，谓语用复数
as well as强调前者，谓语用单数

and 是连接并列的成分,AS WELL AS强调的是他前面的主语,其谓语动词和前面的主语保持一致,当然很多情况下,意思上两者是可以互换的

and 和as well as意思都是和，也的意思，不过前者用在句中，后者用在句末，as well as前还要加一个逗号