英语语法分析

J.J. Balmer, who was a school teacher in the 1800s, was the first to describe these lines that could be seen from hydrogen.

J.J. Balmer，在19世纪是一名教师，他是第一个描述这些可以从氢气中看到的线条的人。

What Balmer did, all he has is those four numbers.

巴尔末做的和所有他有的就是这四个数字。

The small issue is if Balmer should be replaced (which is yes).

还有一个小问题，就是鲍尔默应该换了吗？ (答案是该换了)。