You can have one, and only one.

你可以吃一块，只一块。

Today, rates of unique baby names, names given to one and only one child per year, are at an all-time high.

如今，独生婴儿名字率，即每年给一个且只有一个孩子取的名字，处于历史最高水平。

There is one, and only one, arrangement in which the pieces make a complete picture.

只有一种，而且只有一种排列，其中的碎片构成了一幅完整的图画。

And each term should be used in one and only one way throughout the dissertation.

在整个论文中，每一个术语都应该以一种且只有一种方式使用。

According to Bostrom, one and only one of these conclusions will prove true sometime in the distant future.

根据 Bostrom 的说法，这些结论中只有一个将在遥远的未来某个时候被证明是正确的。

Unlike most other spiders, this species lays one and only one clutch of 40 eggs in her lifetime.

与大多数其他蜘蛛不同，这种蜘蛛一生只能产下一窝卵，每窝 40 个卵。

Every input lands on one and only one output, and every output has won an only one input as a 1ST pass.

每一个输入都落在一个且只有一个输出上 每一个输出都只赢得了一个输入作为第一次传递。

Every pair of numbers gives you one and only one vector, and every vector is associated with one and only one pair of numbers.

每一对数字都给出一个且只有一个向量 每个向量都与一对且只有一对数字相关。

He noticed that when he put various coloured balls of yarn out in his garden, almost always one and only one became popular that season for incorporation into local birds' nests.

这位博物学家发现，在把各种颜色的毛线球放在花园里之后，几乎总会有且仅有一种颜色的毛线球会在那个季节流行起来，出现在当地许多鸟窝里。

So even if it is difficult to answer a question, there may be one – and only one – right answer. Either there is a kind of existence after death – or there is not.

因此，即使要回答一个问题很不容易，但无论如何总会有一个(且仅此一个)正确答案的。人死后要不就是透过某种形式存在，要不就是根本不再存在。

In this case, there will always be one and only one vector that lands on V, and you can find it by playing the transformation in reverse, following where V goes.

在这种情况下 总有且只有一个向量落在V上 你可以通过逆向变换找到它 沿着V的方向。