Sentence examples for has long challenged from inspiring English sources

Measuring the beach has long challenged coastal geologists.

While not exactly rejecting her royal identity, Princess Haya has long challenged what it means to be a princess.

China has long challenged Japan's control of the Senkaku islands, a rocky outcrop known as the Diaoyutai in Chinese.

Spain has long challenged Britain's sovereignty over Gibraltar, which it has held since the treaty of Utrecht in 1713.

El-Guerrouj is the most accomplished athlete in this north African constitutional monarchy, which has long challenged Kenya and Ethiopia for distance-running supremacy on the continent.

"It's like saying, 'You're a bird, but you can't fly,' " cracked Sister Jeannine Gramick, an American nun who has long challenged the church on this issue, when we chatted recently.

Economists have long challenged that absolutism.

Conspiracy theorists have long challenged the official version of events surrounding Cooke's death.

Groups like Americans United for Separation of Church and State have long challenged Mr. Barton's conclusions.

Al Qaeda's elasticity and adaptability have long challenged those who seek to define, analyze, contain or defeat the group.

The rival fields – famously characterised as Two Cultures by CP Snow – have long challenged, borrowed or stolen from each other.