Behavior plays a key role, with biology an intriguing contributing factor.

行为举止起关键作用, 同时生物学也是令人感兴趣的诱因之一.

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It was discovered later that drug use was a contributing factor.

后来发现原来是他服用违禁药物导致了悲剧的发生.

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The seaport was a contributing factor in the growth of the city.

海港是个对城市发展起着重要作用的因素.

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There was speculation that an alleged dependency on prescription painkillers may have been a contributing factor.

也有人猜测,据传迈克依赖止痛处方药,由此加剧病情.

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