They were already under stress, thanks to the aftershock of last year's drought.去年干旱造成的后果已经让他们感到压力了。The first aftershock came just minutes after the earthquake.地震发生后仅几分钟就出现了第一次余震They were working frantically in the fear that an aftershock would jolt the house again.他们拼命地干着，担心余震可能会使房子再次受到震动。