根据理论模型推测，地壳在大地震发生前的数小时内很不稳定，但要在现实世界中探测到这样的不稳定性还是个挑战。

Theoretical models predict that the crust is unstable in the hours leading up to a major earthquake, but detecting that instability in the real world has proven a challenge.

youdao

根据理论模型推测，地壳在大地震发生前的数小时内很不稳定，但要在现实世界中探测到这样的不稳定性还是个挑战。

Theoretical models predict that the crust is unstable in the hours leading up to a major earthquake, but detecting that instability in the real world has proven a challenge.

youdao