大多数情况是可数．
由于我们一般用solution的”方法”，”解答”等意思，这些情况都是可数的．
具体看字典：
solution
KK: []
DJ: []
n.
1. 解答;解决(办法);解释[C][(+to/of/for)]
It may take a long time to find a solution to the problem.
也许要花很长时间才能找到解决这个问题的办法。
The solution of the problem requires a lot of time.
解决这个问题需要很多时间。
2. 【数】解法,解式[C]
3. 溶解,溶化;溶解状态[U]
Salt can be held in solution in water.
盐能溶于水。
4. 溶液,溶剂[C][U]
She rinsed her mouth with a solution of salt in water.
她用盐的水溶液漱口。
5. 瓦解;中断;消散[C][U]
6. 【律】(债务的)清偿;(契约或义务的)履行[U]