在古罗马时期，意大利半岛上有大面积的冷杉林，是建造军舰的首选材料，但是，冷杉的稀缺性早在14世纪早期就出现了。
In ancient Roman times, the Italian peninsula had great forest of fir preferred for warships, but scarcity was apparent as early as the early fourteenth century.
作为一个终身近视患者，处方眼镜尤其是处方太阳镜因其所谓的精确性和制造材料的稀缺而价格一直居高不下。
As a lifelong near-sighted person, prescription eyeglasses and especially prescription sunglasses have long commanded a high premium due to the seemingly precise and scarce nature of creating them.
这使得我们对这些古代哲人们的材料非常稀缺。
As a result, we have very few texts from these ancient philosophers.
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