year和years的区别：years是year的复数形式，year是一年，years是很多年,另外大于一岁就用复数years old，若刚好一岁及以下就用year old，例如At 54 years old her energy and looks are magnificent.The car is less than a year old, and therefore still under guarantee.

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year和years的区别：years是year的复数形式，year是一年，years是很多年,另外大于一岁就用复数years old，若刚好一岁及以下就用year old。