n. 
困难
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craniad, cranial, cranial cavity, cranial nerve, cranialgia, craniamphitomy, craniata, craniate, cranic, cranidium,
相似单词
bradykinetic, bradykinin, bradykininogen, bradylalia, bradylogia, bradymasesis, bradymetabolism, Bradyodonti, bradypepsia, bradyphagia,