" To get hold of" something means to get access to something, to be able to actually " obtain" (obtain) something.

“To get hold of” something 的意思是可以接触到某物， 能够真正地“获得” （获得）某物。

Irma collected picture post-cards, and Mrs. Herriton or Harriet always glanced first at all that came, lest the child should get hold of something vulgar.

厄玛收集照片明信片，赫里顿太太或哈丽雅特总是先看一眼，以免孩子弄到粗俗的东西。