complex analytic singularities造句

例句与造句

1. He completed both his undergraduate studies and his doctoral research work at Duke University, receiving his Ph . D . in 1986 for his results in the area of complex analytic singularities under the direction of William L . Pardon.
2. It's difficult to find complex analytic singularities in a sentence. 用complex analytic singularities造句挺难的