explanation可数吗

例句：

1、It should be emphasized that this is only one possible explanation.

应该强调的是，这只是一种可能的`解释。

2、'I had to see you,' he said, by way of explanation.

“我当时必须来找你。”他解释道。

3、She didn't give an adequate explanation for being late.

她没有给出充分的理由说明迟到的原因。

4、The most likely explanation is that his plane was delayed.

最可能的解释是他的飞机晚点了。

5、The facts allow of only one explanation.

这些事实只可能有一种解释。