... alternation pattern 交换型 alternation rule 交替律 alternative （1）交换形式；同源词之一；双式词之一；（2）交替；更换，（3）选择方案，（4）可选成分 ...
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the rule of alternation 交替规则
alternation rule
变更规则
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Even though Chile has advanced immensely in terms of democracy, economy and the rule of law, it is vital for a full functioning democracy that alternation of power takes place.
CENTERFORSECURITYPOLICY: High stakes in Chile
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