The verification of the report took several days of cross-checking.报告的核实经过了好几天的各方反复查证。By cross-checking claims, we will flush out the fraudsters.通过反复核对索赔请求，我们会把欺诈者揪出来的。They want to ensure such claims are justified by cross-checking with other records.他们想要通过核对其他记录来确保这种主张是合理的。