最初的地震之后又发生了几次较弱的震动，使建筑物嘎嘎作响。

The initial earthquake was followed by several weaker ___shocks that rattled the buildings.

爆破装药产生了强烈的震动，几个街区之外都能感觉到。

The demolition charge caused a powerful ___shock that was felt blocks away.

当一根支撑梁倒塌时，救援人员感觉到一阵剧烈的震动传遍了残骸。

Rescuers felt a sharp ___shock run through the wreckage as a supporting beam gave way.