1. 极为重大的：earthrise 地出 | earthshaking 极为重大的 | earthshine 地球反照

2.

2. 翻天覆地的：earthsciencegeoscience 地球科学 | earthshaking 翻天覆地的 | earthshaking 震撼世界的

3. 震撼世界的：earthshaking 翻天覆地的 | earthshaking 震撼世界的 | earthsoilclay 泥土

4. 震撼世界的/翻天覆地的：earthscience /地球科学/ | earthshaking /震撼世界的/翻天覆地的/ | earthshine /地球反照/

1. loud enough to shake the very earth

2. sufficiently significant to affect the whole world

    e.g. earthshaking proposals
           the contest was no world-shaking affair
           the conversation...could hardly be called world-shattering

    Synonym: world-shakingworld-shattering