They hid me from the police in their attic.（hide为及物动词）

参考译文：他们把我藏在他们的阁楼上不让警察知道警察。

They hid from the police。（hide为不及物动词）

参考译文：他们躲避/躲开/避开了警察。

解答如下

(1)hide, vi.为不及物动词后面接介词from,表示躲避/躲开某人/某物

Greta Garbo went to great lengths to hide from reporters and photographers.  

葛丽泰·嘉宝想方设法躲开记者和摄影师。

A zebra's stripes help this animal hide from its enemies.  

斑马条纹有助它们避开天敌.

He flung down on the floor to hide from his parents.  

他迅速卧在地上,想躲开他父母.

(2)hide, vt.为及物动词后面接宾语再接介词from,表示把某人藏起来或隐瞒某事不让某人知道/发现”

He tried to hide the truth from me.

他设法对我隐瞒事实真相

Are you trying to hide anything from me?  

你是不是有什么事想瞒着我?

They hid me from the police.

他们把我藏起起来不让警察知道/发现。

   hiding from their enemies 躲避他们的敌人（《牛津英语搭配词典》）

    They hid me from the police in their attic. 他们把我藏在他们的阁楼上躲避警察。（此句中的 hid 是及物动词）

    They hid from the police.= They hid themselves from the police. 他们躲避警察。（前一句的 hid 是不及物动词；后一句的 hid 是及物动词）