Optimized for one problem: By their nature, hierarchical databases optimized access to the data through one specific path.

针对单个问题的优化：本质上，层次数据库就通过一条指定的路径来优化数据访问。

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By becoming aware of the nature of the breath and retaining the breath, one can control the systems of the body and one can harmonize the brain wave patterns.

通过意识到呼吸以及控制呼吸的本质，一个人就可以控制身体的系统，也让脑电波模式和谐。

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If one identifies with all of nature, one is pained by every felled tree.

假若一个人认同自然界的一切，他便为每一株被伐之树而苦。

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Changing the quantities of proteins such as the one made by PSD-93 would probably change the nature of the affected cell quite radically, and might even be responsible for generating the different types of nerve cell that are known to exist.

ECONOMIST: Brain development may be influenced by genetic parasites

The terms sense and antisense were coined by Paul Zamecnik to show the complementary, double-strand nature of DNA. One strand consisted of alternating patterns of the four nucleotides that make up DNA adenine, cytosine, guanine and thymine and it could be read in order.

FORBES: Antisense and Sensibility

First of all, I just want to thank Harry Reid. (Applause.) I recently said he's got one of the toughest jobs in Washington -- managing an institution that by its very nature is, let's face it, you guys are a little difficult to manage.

WHITEHOUSE: President Obama Takes Questions from Senate Democrats