For an element to be valid, each assertion in its sequence of assertions needs to evaluate to true.

一个元素要想成为有效的元素，其断言序列中的每个断言的值都必须为true。

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If we receive the last message in a group, then we can obtain the group identifier and use its sequence number to determine the size of the group.

如果接收到了组中的最后一条消息，则可以获取组标识符，并使用其序列号来确定组的大小。

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Objective to clone the gene of human lactoferrin and analyze its sequence.

目的克隆人乳铁蛋白基因并进行基因序列分析。

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Suppose instead, I want a machine that can take a recipe, the description of a sequence of steps, take that as its input, and then that machine will now act like what is described in that recipe.

假设换成这个，我想要一台可以安装描述，一系列步骤的结果的方法的机器，把那个当做输入设备，然后那台机器可以像方法中,描述的那样运行了。

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There are hundreds,thousands of them known now, and each one has a specific character and one aspects of its character is that it only binds and cuts at a particular sequence of DNA.

已知的有成百上千种,每一种都有自己的特性,特性之一是,只结合和切割特定的某一种DNA序列

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Instead, Syngenta has agreed to make its sequence available on its website, subject to users registering with the company.

ECONOMIST: Two new sequences offer researchers promise and problems

The true strength of the movie might be its opening sequence but the problem it will encounter in the USA is that these characters are simply too British, the plot we are asked to care about too wrapped up in British sentiment, particularly around actress Judi Dench.

FORBES: Move up http://i.forbesimg.com t Move down

While health officials caution that there are no indications the virus can be transmitted from one person to another, scientists who have studied its genetic sequence said this week that the virus may have recently mutated into a form that spreads more easily to other animals, potentially posing a bigger threat to humans.

NPR: China Kills Market Birds As Flu Found In Pigeons