investigation test meaning in English

研究性试验

To peter gregory , the investigation tested the professionalism and integrity of the icac - a test they passed with flying colours : " the evidence was hidden behind huge volumes of complicated documents . investigators had to rack their brains to track every tiny detail , but were dauntless despite the possibility of confronting the rich and the powerful . the high social status of the suspects did nothing to dampen our commitment to see justice done
作为专案小组的主要成员，祁国利指出：本案罪证隐藏在大量文件当中，十分复杂和繁琐，调查人员要费尽心力去挖掘，大家本著锲而不舍和无畏权贵的精神，追查每一个细节，终能成功破案，对身居高位的受疑人亦秉公处理，绝不容许滥用职权，谋取私利。