这项研究应能表明这些变革在多大程度上正在得以实施。
The research should show ___the ___extent ___to ___which these changes are being implemented.
相处的时间会影响某人对你产生影响的程度。
Time spent together affects ___the ___extent ___to ___which someone influences you.
很难评估改革在多大程度上改善了环境。
It's hard to assess ___the ___extent ___to ___which the reforms have improved the environment.