In the years following an eight-cent increase in the federal tax on a pack of cigarettes, sales of cigarettes fell ten percent.
在联邦政府对每包香烟增加8美分的税收后的几年里，香烟的销量下降了10%。
He has lived in a Wolf pack for several years and managed to transfer important knowledge to the wolves and borrow the animals' culture.
他在一支狼群中生活过数年，负责向野狼传授重要的知识，以及调查他们的文化。
He was able to pack a lifetime of experience in those 20 years.
他短短的20年的经验，超过许多人的一生。
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