They occur when cholesterol hardens and this then blocks bile ducts , according to the national institute of diabetes and digestive and kidney diseases , national institutes of health .
Our natural wax is made from tree resin and hardens quickly .
我们的天然蜡是由树树脂和硬化快。
Eventually , our skepticism about changing things for the better hardens into an habitual attitude .
最终,我们那对改善事物的怀疑观固化为惯常的态度。
But during arousal , your sponge swells and hardens , and it becomes more obvious to touch .
但是在性冲动过程中,海绵体膨胀,变硬,摸一下会有很明显的感觉。
Ask the damage that aorta wall limitation hardens please .
请问主动脉壁局限性硬化的危害。
Their version of the polymer is a liquid that becomes a gel when illuminated , so when the peg-coated cells are exposed to light , the polymer hardens and encases the cells in cubes with side lengths ranging from 100 to 500 millionths of a meter .