scrape away at

After a while they moved closer and began to scrape away at the surrounding sand.
Al fin se acercaron y empezaron a escarbar juntos la arena alrededor.
One cannot merely scrape away at the surface of evil; one has to get down to its roots, its causes, the inner truth of conscience.
No podemos quedarnos en la superficie del mal, hay que llegar a su raíz, a las causas, a la más honda verdad de la conciencia.
Every weekend for as long as I can remember, my father would get up on a Saturday, put on a worn sweatshirt and he'd scrape away at the squeaky old wheel of a house that we lived in.
Cada fin de semana desde que tengo uso de razón, los sábados, mi padre se levantaba, se ponía una camiseta desgastada y raspaba en la vieja rueda chirriante de la casa donde vivíamos.
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