对死亡只有模糊认识的志愿者在读了关于献血量短缺的文章后更倾向于带上小册子。
People who thought about death in the abstract were more likely to take a pamphlet if they read the article about a blood shortage.
我志愿帮助他们探索几段穿越死亡谷的路线，我驾车来到Ulida Flat附近的探险队营地，晚上在那宿营。
Offering to try a few routes for them through Death Valley, I made the drive to a base camp near Ulida Flat, where I camped for the night.
研究团队对1000名志愿者进行了长达4年的研究，让他们依靠自己的嗅觉分别12个标本的气味，在这4年期间，有321人死亡，占到总数的27.6%。
The team gave more than 1, 000 volunteers a standard 12 item smell test and then followed them for four years.
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