为什么大多数拉链上都刻着“YKK”?

　　乍一看，这三个字母好像有点眼熟哎……

　　那这个字样代表了什么呢?

　　原来，YKK is a huge company that makes zippers! YKK就是一家生产拉链的公司，最喜欢把自己公司的名字刻在生产出来的每一个拉链上……

　　关于拉链的趣事儿还挺多，让我们一起来看看吧!

　　Here is a bit of zipper history. The "clasp locker" as it was called, was invented in 1891 by Whitcomb L. Judson.

　　先来给大家讲一讲关于拉链的那些历史吧!1891年，一个叫惠特科姆 · 贾德森的男人，发明了“卡环扣”。

　　The clasp locker was an assemblage of hooks and eyes that Judson thought would save people time and sore backs fastening their shoes with one hand.

　　这个卡环扣主要是由一个个的小钩子和扣眼组成的，贾德森认为这样不仅可以节省人们的时间，还可以让人们仅仅用一只手就可以系鞋带。

　　Later, in 1913, Gideon Sundback of Sweden developed the predecessor of today's zipper that used metal teeth, and patented it in 1917. Sundback's design was the first design that saw practical use. Sundback's "separable fastener" had more fasteners per inch than the earlier clasp locker.

　　而在后来的1913年，瑞典人吉迪恩·桑德巴克发明了今天我们使用的金属齿拉链的前身，并于1917年申请了专利。桑德巴克的设计，是第一个看到了拉链的实际用途的设计。他的“可分扣式”的锁扣设计，让每英寸的扣件比之前的卡环扣更多。

　　Later, the B.F. Goodrich Co. used the separable fastener in some rubber boots and came up with the name "zipper" because the boots could be fastened with one hand. Today, zippers are also made of plastic as well.

　　再后来，B.F.古德里奇公司在一些胶靴中使用了这些可分扣式锁扣，并想出了“拉链”这个名字，因为这些靴子可以只用一只手就能够扣好。今天，拉链也可以由塑料制成。