refractory block

例句：

1. 1. The patient was diagnosed with a refractory block that required immediate surgical intervention.
   患者被诊断出患有一个抵抗性块状物，需要立即进行手术治疗。
2. 2.The researcher found that the refractory block could be dissolved by certain chemicals.
   研究者发现，这种抵抗性块状物可以被某些化学物质溶解。
3. 3.The patient's condition worsened after the surgery, and a refractory block developed again.
   手术后，患者的病情恶化，又出现了抵抗性块状物。