The genetic switch involves acetylation, the introduction of an acetyl group into a molecule at the DNA level of chromatin resulting in genetic transcription.

基因“开关”涉及乙酰化作用，也就是将乙酰基群在染色质的DNA水平上引入到分子中，由此完成基因转录。

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One group of children had a strictly pedagogical introduction.

第一组孩子接受了一套严格的教学指导。

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Clear introduction to climate change issues and Suggestions for action from the environmental pressure group.

提供气候变化问题的清晰介绍和来自环保压力团体的行动建议。

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Right at the beginning of this event there was an introduction by a group called Champion the Vote.

BBC: South Carolina: Up close and in personhood

The introduction of a new Qantas Group structure with dedicated CEOs for Qantas International and Qantas Domestic will bring further rigor to our business.

CNN: Qantas predicts huge profit slump

The Trusted Computing Group Storage Technical Working Group has been leading the digital storage industry in the introduction of storage security built into individual storage devices.

FORBES: Creating Security from the Inside Out