The reasons for the project collapsing were circumstantial.是什么意思？

The reasons for the project collapsing were circumstantial.

工程垮掉系环境所迫。

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。

reasons

n. 理由( reason的名词复数 )，原因，理性，理智；v. 推理，思考( reason的第三人称单数 )，争辩；

例句
Several people buttonholed television reporters to explain to them their reasons for not voting.
几个人拉住电视台记者非要向他们解释自己不投票的理由。

for

prep. 为，为了，倾向于，关于，当作；conj. 因为，由于；

例句
I've come looking for a bit of advice.
我特来讨教。

project

vt. 放映，计划，发射，展现，使突出；vi. 伸出，突出；

例句
...a project from which considerable benefit will accrue to the community...
使社区持续受益的项目

collapsing

n. 压扁[平]，毁坏，断裂；v. 折叠( collapse的现在分词 )，倒塌，崩溃，（尤指工作劳累后）坐下；

例句
The reasons for the project collapsing were circumstantial.
工程垮掉系环境所迫。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

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。