英文是fifty-one，
例如There are fifty － one cities and a large number of towns and villages The capital stands on both sides of a river ， and has more than eighty thousand houses.
有51座城市，大量的市镇和村庄。都城横跨一条河，有8万座房子，
They were from fifty －one to one hundred yards long, and they gradually tapered from a nine-log breadth at their sterns, to a three-log breadth at their bow-ends.
它们的长度由100码逐渐缩为51码，由尾部9根原木的宽度缩小到头部3根的宽度。
英文：Fifty-one
例句
This was our favourite bus for fifty-one years.
五十一年来，它是我们最喜欢的公交车。
Fifty-one, work is very busy, can not go to sleep;
上班工作很忙碌，不免有点想睡觉；
In nineteen fifty-one, he published his "Quality Control Handbook."
1951年，他出版了《质量控制手册》。
Fifty-one million urban jobs were created over the past five years.
五年全国新增城镇就业5100万人。
