OBJECTIVE: To research the cell cycle change and cell surviving of the tumor cell undergone hypoxic and radiated condition.

目的：研究肿瘤细胞在缺氧及放射情况下细胞周期的改变及细胞存活的情况。

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Objective To explore the mechanism of cell proliferation cycle change of human embryonic pulmonary fibroblasts (HEPF) induced by crocidolite.

目的探讨青石棉致人胚肺成纤维细胞(HEPF)增殖的细胞周期变化的机制。

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Its numbers fall tenfold to thirty in a typical cycle, and a hundredfold change can occur.

在一个典型的循环中，其数量会以十倍到三十倍减少，甚至会出现一百倍的变化。

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Skeptics say global warming is part of a natural cycle of climate change.

VOA: standard.2009.12.09

It is a life cycle change in the population group.

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The only way to stop the cycle is to change behaviors, one woman at a time.

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In order to signal a genuine turn in the cycle the indices must change direction in a way that is pronounced in size, pervasive across individual components and persistent.

ECONOMIST: Leading economic indicators