'impossible to practice' is correct and usable in written English.
This phrase is commonly used to describe an activity or situation that is not able to be done for whatever reason. For example, "It is impossible to practice skydiving without the right safety equipment."
Since all of the company's products have the institute's seal of approval, it is virtually impossible to practice accounting without buying some items from CPA2Biz.
He came here so that he could practice his religion, the religion of the Dalai Lama, which is difficult and in some cases impossible to practice in China.
A young woman asked what advice I had — specifically, why they should bother learning the trade when it was all but impossible to practice it in Burma (a.k.a. Myanmar).
A young woman asked what advice I had specifically, why they should bother learning the trade when it was all but impossible to practice it in Burma (a.k.a. Myanmar).
The main conclusion was that surgical treatment is indicated in motivated athletes if carefully followed conservative treatment is unsuccessful after more than 6 months, making it impossible to practice a sport.
I know folks would like to blame poor read-from-the-PowerPoint teaching on the state, arguing that standards make it impossible to practice flexible "child-centered" differentiated pedagogy.
More recently, however, theorists and practitioners have acknowledged the importance of options on real assets.3 But quantitative models for valuing these kinds of options are almost impossible to apply in practice, since truly strategic options are so vague and often depend on a manager's vision of what might happen.
Null subcarriers may render equi-distant and equi-powered pilot symbols impossible to use in practice.
Undargaa effectively includes these histories to build the case that common property rules and principles can be almost impossible to apply in practice, especially when it comes to crafting institutions for natural resource management.
It is almost impossible to do well unless you practice your mini-presentation in advance with the help of a stopwatch.
Those who do not improve will have their accreditation removed, effectively making it impossible for them to practice.
