本文就有关蓝离散星本质和起源的各种假说进行了讨论。我们认为，不同的蓝离散星可以具有不同的形成机制，不应强求所有的蓝离散星都起源于同一种物理过程。
In this paper, various explanations for their nature and origin are reviewed, from which it is suggested that there may exist a variety of formation mechanisms leading to different blue stragglers.
英汉语言中的确存在着大量的词汇空缺和语义的非对应性，不应该强求对等。
It really exists a great number of vocabulary vacancy and semantic disparity in English and Chinese language, therefore, a parity should not be forced.
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