They must be keenly aware of the world in which they live, what is right bout it and what is wrong, so that they can fulfil their role as instrument of change.

他们必须对所处的世界有敏锐的意识，明白这世界对在何处错在何处，这样他们才能起到变化的工具这一作用。

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Each of the components may have options for the way in which they fulfil their security role and end to end paths must be determined to match up the capabilities across all capabilities.

每个组件可能在执行安全角色方面有多个选择，而必须确定端到端路径来与所有功能的情况相匹配。

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Einstein proposed the existence of something he called the cosmological constant, to fulfil the role now assigned to dark energy.

爱因斯坦认为存在一个宇宙常数来填补现在暗能量的位置。

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Suffolk's police and crime commissioner (PCC) has said he will fulfil his role without appointing a deputy.

BBC: Suffolk's police and crime commissioner's deputy pledge

More fundamentally, the voluntary sector, particularly religious groups, may not be able or willing to fulfil this role.

ECONOMIST: The working poor need help, and in all kinds of ways

However, overfishing throughout the past century has so depleted these populations that they no longer fulfil this role.

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