repetitive adj. 重复乏味的；多次重复的
switch my academic focus
theoretical physics
I gradually realised that…
fundamental questions about how the universe works
I became much more motivated.
relativity （音读错了，注意音标）
increasingly （音读错了）
steep
the underlying principles/laws behind…
fundamental questions about…
how the universe works
the laws that govern the universe
underlying
句型
I felt it was necessary for me to +
I gradually realised that…
I realised I needed to