The rules architect plays a key role in this process.

规则架构师在此过程中扮演着重要角色。

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That suggests that genetics plays a key role in the disorder.

这就表明，在发育障碍的形成中，基因因素起着关键的作用。

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Experts say selenium plays a key role in the health of skin cells.

专家说，硒元素对皮肤细胞的健康有重要意义。

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"Civil Society plays a key role in helping to communicate the need for mothers to bring their children in early for vaccines to complete the vaccination series to make sure that non-governmental organizations deliver and offer vaccines not only one day a week necessarily but on a regular basis,".

VOA: standard.2009.12.28

Personal borrowing plays a key role in how many small business people finance their companies.

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The institution also plays a key role in the fight against money-laundering and terrorism.

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These cells produce dopamine - a chemical which plays a key role in movement.

BBC: NEWS | Health | Activity 'cuts Parkinson's risk'