The cameras were not an intrusive presence...是什么意思？

The cameras were not an intrusive presence...

那些摄像机的存在并不令人反感。

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。

cameras

照相机， 暗箱， 摄像机， 摄影机；

例句
Video cameras with night vision can be activated by movement.
带夜视镜的摄像机一有动静就会启动。

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。

not

adv. 不，[用以表示否定、否认、拒绝、禁止等]不是，几乎不，未必，没有[用于否定后面的词或短语]；

例句
It became very clear that the incident was not just an aberration, it was not just a single incident.
事实已经很清楚，这件事不是偶发的，它并不是一起孤立的事件。

an

art. 一（在元音字母前代替不定代词a），一任一某一，一个；

例句
He started eating an apple...
他开始吃苹果。

intrusive

adj. 闯入的，打扰的，侵入的；

例句
The cameras were not an intrusive presence...
那些摄像机的存在并不令人反感。

presence

n. 出席，到场，存在，出现，风采，风度，鬼魂，神灵；

例句
The presence or absence of clouds can have an important impact on heat transfer...
有无云层对热量的传递会产生重要的影响。