Investigators have identified a bulldozer operator.是什么意思？

Investigators have identified a bulldozer operator.

调查人员已认定一名压路机司机.

investigators

n. 调查者，审查者( investigator的名词复数 )；

例句
Some investigators regarded her as the brains of the gang.
一些调查员认为她是该团伙的决策者。

have

aux. 用以构成完成式及完成式的不定式，表示已经…；vt. 有，具有，拿，取得，从事，必须，不得不；n. 〈口〉有产者，有钱人，富国，〈英俚〉欺骗，诈骗；

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

identified

v. 认出( identify的过去式和过去分词 )，支持，确认，辨认；

例句
He was identified only by his uniform and personal belongings.
他的身份只是通过制服和个人财物确定了下来。

bulldozer

n. 推土机，恐吓者，威胁者；

例句
Investigators have identified a bulldozer operator.
调查人员已认定一名压路机司机.

operator

n. 经营者，操作员，电话接线员，运算符；

例句
The operator expects the ship to be out of commission until the end of September.
技工预计这艘船到9月底才能修好。