trouble可数还是不可数？

n.
1. 烦恼;忧虑[C][U]
Her heart was full of trouble.
她忧心忡忡。
2. 困难;困境;麻烦的事[U][C][(+with)][+v-ing]
Her son has got into trouble again.
她儿子又惹麻烦了。
You\'re asking for trouble.
你是在自找麻烦。
I had a little trouble learning English grammar.
我学英文语法有过一点困难。
3. 麻烦,打扰,费事[S][U]
4. 纷争,动乱,骚乱[P1]
There used to be a lot of troubles in that region.
那个地区过去动乱不断。
5. 故障[U][(+with)]
My car has got engine trouble.
我的汽车引擎发生故障。
6. 缺点,毛病[C][(+with)]
7. 疾病,苦痛[U][C]
I often have trouble with my teeth.
我常常牙痛。

注:[U]表示不可数；[C]表示可数。