In this paper we give the definition of the family of lines in space and its forms of equations.

本文给出了空间直线束的概念，并给出了空间直线束的两种形式。

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Biologists are now coming round to the idea that much of nature is not a product of neat family lines, but a messy mass of cross links.

现在生物学家需要重新开始到这种观念，自然界里有许多的东西，并不全是纯净家族血统的产物，恰恰是交叉藕合、杂乱无章的物种。

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The find moves several species thought to belong to crocodile family fossils to the archosaur side of species lines, and indicates the dinosaur family had deeper roots than previously suspected.

这一发现推动了一些之前被认为是属于鳄鱼家族化石中的物种向祖龙这一边的进化链靠拢，这也证实了恐龙家族有着比之前的推测更深厚的根源所在。

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Dr Ahmed al-Saffar says the focus has been on the family while other lines of investigation had been dismissed.

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Other popular methods are borrowing money from family and friends, using home equity lines of credit, bank loans, Small Business Association loans, and even credit cards (Hisrich, et al., 2010, p. 310-313).

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In theory the Al Saud family's secretive Allegiance Council, composed of princes representing the lines of each of Abdel Aziz's sons, decides on matters of succession.

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