这个钢琴谱怎么看?

这是老外自己弄出来的谱子，不能用平常的思维去看
下面是网站上给的释义原文：

intro:
4|-ga--g--|g---|-ga--g--|a---|
4|d----d--|e---|d----d--|d---|
2|g--g-h-3|c--2|g--g-h-3|d---|
b|1-2-3-4-|1234|1-2-3-4-|1234|

-the numbers (1-7) to the left of the tab, indicates in what octave
(starting at the lowest C) to play the notes in that row. When numbers appear elsewhere in a row, it is to indicate a new octave.
-ordinary letters (cdefgah) symbolices the corresponding notes
-capital letters (C,D,F,G and A) are used instead of c#,d#, f#, g# and a#.
-the symbol ">" is used to cut notes
-the symbol "|" is used to separate each measure (section of beats)
-the symbol "-" indicates nothing
-the bottom row keeps track of the beats, and tells if the notes above are whole, half, quarter or etc. In the example above, a "-" in section 1 lasts half as long as a "-" in section 2. This "beat-line" is