Astronomers have long suspected globular clusters contained intermediate-mass black holes, but there has been no conclusive evidence of their existence there to date.
天文学家长期怀疑球状星团中包含中等质量的黑洞，但至今一直没它们存在的确凿证据。
Recent studies have indicated the existence of dynein heavy chain and light chain in higher plants, but no data about dynein intermediate chain in higher plants have been reported.
近来的研究表明在高等植物细胞中存在细胞质力蛋白的重链和轻链，但力蛋白中间链在高等植物细胞中还未见报道。
By increasing the condition of the integral mean value theorem, we prove that the existence of intermediate point and the existence of interval are corresponding to each other.
给出了积分中值定理的一个注记，证明了中值点的存在性与覆盖中值点的区间的存在性是相互对应的。
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