explanation可數嗎

例句：

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

應該強調的是，這只是一種可能的`解釋。

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

“我當時必須來找你。”他解釋道。

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

她沒有給出充分的理由説明遲到的原因。

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

最可能的解釋是他的飛機晚點了。

5、The facts allow of only one explanation.

這些事實只可能有一種解釋。