Sentence:  For the albumin method , equal volumes of 30 % bovine albumin , sample and 2 % cells suspended in saline were <WSD>allowed</WSD> to stand at room temperature for 1 hr and then were centrifuged at 1000 rpm for 1 min . 
Meaning of the word marked with <WSD> tags:  make it possible through a specific action or lack of action for something to happen