Significados de strange persistency em inglês

Her lamentations continued with a strange abundance, a strange persistency.

She mainly devoted herself to Fina and some books lent her by Alick, and kept the house with strange persistency.

Great as was Andre's preoccupation, he could not fail to notice that his visitor's eyes sought the veiled picture with strange persistency.

But they persevered, working with a strange persistency and silence, that gave them the appearance of so many phantoms engaged at their ghostly labor.