请教大大 我们都知道两个独立子句中需连接词，但为什么有些阅读测验段落只用逗号连
结(如下面两段皆用逗号)？
如果英文作文这样写是对的吗?
目前找不到相关解说，能否提供相关资讯，谢谢!
段落一
Around 1606, he had studied dispersion in prisms, measured the refractive indi
ces of different liquids placed in a hollow glass prism, studied refraction in
crystal spheres, and correctly understood refraction in the rainbow before De
scartes.
段落二
Perhaps the most interesting thing is that the first discovery of the sine law
, made by the sixteenth-century English scientist Thomas Harriot (1560-1621),
has been almost completely overlooked by physicists, despite much published ma
terial describing his contribution.