及物动词 vt.
1.
解释;说明;阐明[(+to)][+wh-][+(that)]
He explained that he had been cheated.
他解释说他是上当受骗了.
Can you explain how the machine operates?
你能解释一下这机器是如何运转的吗?
Please explain this rule to me.
请给我讲解一下这条规则.2.
为...辩解;说明...的理由(或原因)[+wh-]
He made up a story to explain why he was absent.
他编造了一个故事为他的缺席辩解.
不及物动词 vi.
1.
解释;说明;辩解
I've got to explain about it.
我得解释一下此事.
应理解为“说明了他粗心的理由”,我觉得应取explain 的第二个意思.还有我觉得其实你可以通过查字典,或者百度就可以得到答案的,其实这样更浪费时间.