Absolute instability is a major physics limitation in the realization of the ultimate capability of gyro-traveling-wave tube.

绝对不稳定性是制约回旋行波管性能的主要因素之一。

youdao

It was a major breakthrough in Physics.

UNESCO: Culture

Superfluids are also used to study the fundamentals of matter and test major tenets of quantum physics.

BBC: Magnet repelled over superconductor, SPL

The suspicion of fraud is strong, and diverse and varied interests who fear of losing credibility and the dogmatic stance about the laws of physics are a major barrier.

FORBES: Cold Fusion: Theory or Fact?