However, despite worldwide interest, work on high-temperature superconductors failed to produce the hoped-for development of breakthrough industrial applications, mainly because it proved impossible to raise the materials 'operating temperature far enough.
可是，全球性的高溫超導體開發熱潮並沒有如預期地對工業應用產生影響，主要原因是：超導體的工作溫度始終無法進一步提高。