The evidence against him was purely circumstantial.是什么意思？

The evidence against him was purely circumstantial.

对他不利的这项证据完全是间接证据。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

evidence

n. 证词，证据，迹象，明显；vt. 使明显，显示，表明，证实；

例句
...scientific evidence that did not fully accord with the facts uncovered by the police.
与警方所掌握的情况不完全一致的科学证据

against

prep. 反对，对…不利，紧靠，以防；

例句
His hand brushed against hers; it could have been either accidental or deliberate.
就在有意无意间，他的手轻轻拂过她的手。

him

pron. (he的宾格)他；

例句
They said goodbye to him as he got aboard the train at Union Station.
当他在联合火车站登上火车之际，他们向他道别。

was

v. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质（ be的过去式 ），在，存在，不受干扰；

例句
There was a terrible sadness in her eyes...
她眼神中流露出深深的悲伤。

purely

adv. 完全地，十足地，纯粹地，纯洁地，贞淑地；

例句
Such is the size of the problem that these arguments are purely academic.
问题的实情在于这些论点纯属空谈。

circumstantial

adj. （指描述）详细的，（指证据）有充分细节却无法证实的；

例句
Fast work by the police in Birmingham had started producing circumstantial evidence.
快速开展工作的伯明翰警方已经开始发现间接证据。