我有一张这样的桌子：-
Type | shown | eaten |
-----------------------
a | 5 | 2 |
b | 6 | 23 |
c | 8 | 12 |
d | 19 | 11 |
e | 2 | 22 |
-----------------------
我想这样转换它：-
Type | action | count |
-----------------------
a | shown | 5 |
a | eaten | 2 |
b | shown | 6 |
b | eaten | 23 |
c | shown | 8 |
c | eaten …