持续不断的炮火轰击使整个战场笼罩在烟雾中。

The battlefield was shrouded in smoke from the relentless ___cannonade.

这位作家因为他的争议性观点而遭到媒体的一连串猛烈抨击。

The writer faced a relentless ___cannonade of criticism from the media for his controversial views.