refractory [rɪˈfræktəri]

例句:

• The excreta of aquatic animals - fish, frogs, turtles, snakes, etc - contain similar refractory materials.
  水生动植物如鱼 、 蛙 、 龟 、 蛇等的排泄物中也会含有类似的难处理的物质.
  
• Silicate minerals are characteristically refractory and difficult to break down.
  硅酸盐矿物的特点是耐熔和难以分离.
  
• He is a very refractory child .
  他是一个很倔强的孩子。
  
• The slave-owner can whip his refractory slave.
  来自H. B. Stowe
• "It was one of those refractory cases," Goldberg told me recently.
  来自NEWYORKER
• There is a significant unmet need for U.S. patients with symptomatic, drug refractory persistent AF.
  来自FORBES