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refractary

1、顽固性的

... refluent a.倒流的，回流的 refractary a.难治疗的；顽固性的 refrain v.抑制；忍住 ...

2、难治疗的

...refluent adj.倒流的，回流的refractary adj.难治疗的；顽固性的refrain v.抑制；忍住 ...

3、浇注料

... 棕刚玉Brown fuse.. 浇注料refractary.. 金刚砂carborundum ...

amplification refractary mutation system突变扩增系统;我们通过突变扩增系统

effective refractary period有效不应期

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