It was well known that this metal would withstand the high heat required for incandescence over a long period without disintegration, but it was also known that tungsten was one of the most recalcitrant of the metals.

• 人们熟知这种金属能长时间承受白炽所需要的高温而不会熔解，但人们也知道钨是金属中最难对付的。