The process, known as DNA methylation, is one mechanism of epigenetic change, heritable change that does not alter the sequence of DNA itself.

该过程被成为DNA甲基化，是表观遗传变化的一种，属于不会改变DNA序列的可遗传变化。

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You must change the sequence of the two steps in the process in order for the payroll service to work properly.

您必须更改流程中的这两个步骤的顺序，以便工资单服务能够正常工作。

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Along the way I have some tests, and depending on the value of that test, I may change where I am in that sequence of instructions.

我会按顺序进行一些测试，按照测试的数值，我会改变之指令序列中，我的位置。

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And if the test is true, it will change the value of this program counter to point to some other place in the memory, some other point in that sequence of instructions, and you'll keep processing.

如果测试结果为真，它会改变程序计数器的结果去,指向记忆存储器里的其他地方，指令序列里的其他地方，然后你会继续这个过程。

麻省理工公开课 - 计算机科学及编程导论课程节选

Along the way I have some tests, and depending on the value of that test, I may change where I am in that sequence of instructions.

我会按顺序进行一些测试，按照测试的数值，我会改变之指令序列中,我的位置。

麻省理工公开课 - 计算机科学及编程导论课程节选

An example of a chunky structural change is a duplication or deletion of a longish DNA sequence.

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Wages and salaries data for February pointed to no change in permanent salaries since January, ending a four-month sequence of increases.

BBC: Fall in Scottish permanent job placements