以下为句子列表：
英文: The silicon carbide fiber and polycarbosilane fiber developed in 1990 have come up to advanced world standard. They promise wide application in astronautic field sand national economy.
中文: 1990年研制成功并达到国际先进水平的连续碳化硅纤维和聚碳硅烷纤维，在宇航和国民经济中有着广泛的应用前景。
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