It kind of works, but it wobbles,

应该能滑动起来只是有点不稳
especially if you're hurrying to catch your airplane.

尤其当你赶飞机的时候
That thing starts fish-tailing and wobbling.

那玩意儿肯定会像鱼的尾巴那样左右摇摆
You've just got a strap you're pulling it on--

只有一根带子让你拉着走
so obviously there was a design defect.

很明显这是设计的缺陷
Finally, it was Robert Plath, who was an airline pilot,

后来一个叫罗伯特·普拉斯的飞行员
who invented a new, wheeled suitcase,

发明了一种滚轮行李箱
which he patented in 1991.

并且在1991年取得专利权
This suitcase had--instead of having four little wheels on the bottom,

这种旅行箱不是四个轮子都在底部
it had two wheels on the back.

而是在后面有两个轮子
You didn't pull the suitcase lengthwise;

你不用竖着拖行李箱
you pulled it widthwise,

而是可以横着拖