explanation在表示解释、说明时,既是可数也是不可数名词。作可数名词的情况较多，如举例的some explanations；作不可数名词的情况一般存在于一些固定用法中，如without explanation。

exploration用法

exploration的解释

n. 探险,踏勘,探测

exploration的例句

They decided to make a full exploration of the accident.

他们决定对事故做一次全盘研究。

It is true during their explorations they often faced difficulties and dangers of the most perilous nature.

确实在探险中，他们经常面临着各种最有危险性的艰难和险阻。

explanation的用法例句

1.Their water was turned off weeks ago without explanation.

他们的水在几周以前就毫无理由地被切断了。

2.Herr Kohler wanted an explanation for what he described as "slanderous" remarks.

赫尔·科勒希望有人能够为那些他称之为“造谣中伤”的言辞作出解释。

3.It is possible that there's an explanation for all this.

也许，对于所有这一切，会有一种解释。

4.She had not waited for any explanation but had condemned him unheard.

她没等他解释，就指责他充耳不闻。

5.How do you know that this explanation is wrong?

你怎么知道这个解释是错误的呢?

6.That may be two-bit psychology, but it's the only explanation I have.

那可能是不值一提的心理，但它却是我唯一的解释。