This is true in theory, but not in practice.

这在理论上是真的，但却不是事实。

youdao

Already there are four that have only one clinic for the whole state, making the legal termination of a pregnancy a right that exists in theory but not in practice.

现在美国已经有四个州全州只有一个堕胎诊所，使得合法终止妊娠这一权利只空于理论，却无实践。

youdao

And the second part of the book is devoted to India's speciality: ideas that have prevailed in theory, but not in practice, leaving reformers with nothing more to say, but plenty still to do.

本书第二部份著重探讨印度的专长：理论充满创意，却都没有实行，让改革家已经无话好说，却还有一大堆需要去做。

youdao

In break from past practice, Blake said Clinton will not visit Pakistan on this trip but would do so on another trip in the fall, reportedly in October.

VOA: standard.2009.07.15

We can talk about "religion-ex" since everybody is spiritually equal, but women and men actually in practice are not equal.

我们可以说说“宗教性别“,在精神层面上，人人都是平等的，而实际上女人和男人是不平等的。

普林斯顿公开课 - 人性课程节选

The decay of Christian belief and practice is not a loss but rather an opportunity for poetry, in Crane.

基督教信仰和践行的衰败,在克莱恩看来，并不是损失，反而是诗歌新生的机会。

耶鲁公开课 - 现代诗歌课程节选

It is there on paper but not in practice.

FORBES: Timing Is Everything

And the second part of the book is devoted to India's speciality: ideas that have prevailed in theory, but not in practice, leaving reformers with nothing more to say, but plenty still to do.

ECONOMIST: The future of India

It is, in short, a place that seems to work in practice but not in theory.

ECONOMIST: The German economy