What does 群峰争奇 mean here?
積雲如果迅速地向上凸起，形成高大的雲山，群峰爭奇，聳入天頂，就變成了積雨雲。

If the cumulus bulged quickly forming huge mountain clouds, the peaks fight for their exquisiteness way up to the sky's zenith, they then become the Cumulonimbus.