惟一的英文：
only
sole
unique

参考例句：

The only way to round out your education is by going deep into the realities of life.
使你所受教育更加完善的惟一方法是深入生活实际。

A domain name is a unique name for your web site.
一个域名是你的网站在网络上的惟一名字或者说标示。

His bed was next to the room's only window. The other man had to spend all his time fiat on his back.
他的病床临窗，那是病房里惟一的窗子。另一位不得不整天卧床。

It is the only option for mil lions of men who are subfertile--that ismen who have low-motility sperm
这是一项对许多生育能力低下的男性的惟一选择，他们的精子运动能力差。

Practice is the only yardstick for truth
实践是检验真理的惟一标准

In her entire house, they were the only seasonal decoration.
在整栋房子里。它们是惟一的圣诞节装饰品。

We must be unique is the combination of userid and domain.
用户标识符与域名加在一起的组合应该是惟一的。

The police have only one fingerprint to hang onto.
警察惟一能凭借的就是一个指印。

He is the sole one remaining after the accident.
他是这次空难惟一幸存的人。

The bicycle is the only property I have now.
这自行车是我现在惟一的财产了。

sole是什么意思：
adj. 仅有的，唯一的；专用的，独占的
n. 脚底，脚掌；鞋底，袜底
v. 给（鞋）装底

sole discretion
自行决定权

There was a hole in the sole of his shoe.
他鞋底上有一个洞。

Practice is the sole criterion of truth.
实践是检验真理的唯一标准。

Their sole aim is to destabilize the government.
他们唯一的目的就是要动摇政府的统治。

The soles are made of leather.
鞋底是皮革做的。

unique是什么意思：
adj. 独一无二的；罕见的；独特的

The beauty of Dunhuang is unique in the world.
敦煌的美在世界上是独一无二的。

Because it undermine the uniqueness of humanity.
因为它摧毁了人类的独特性。

His cello technique is unique.
他的大提琴（演奏）技巧是独一无二的。

The custom is unique to the region.
这种风俗是这一地区特有的。

Each datum has a unique key.
每个数据都有一个独特的键。