adulterated substance meaning in English

掺杂的

During the operation , officers attached to the district crime squad of tuen mun arrested two men and two women aged 32 to 34 following the seizure of a 7 . 62 calibre pistol loaded with five bullets as well as 2 . 2 kilograms of suspected no . 4 heroin and adulterated substances in yau oi estate on friday ( september 20 )
行动中，屯门区重案组探员于星期五（九月二十日）在友爱?搜获一支内有五发子弹的七点六二口径手枪，以及二点二公斤怀疑四号海洛英与稀释物料，并且拘捕年龄介乎三十二至三十四岁的两男两女。
Police today ( september 22 ) charged two men and two women aged between 32 and 34 who were arrested in an anti - crime operation mounted in tuen mun on september 20 . they were apprehended following the seizure of a 7 . 62 calibre pistol loaded with five bullets together with 2 . 2 kilograms of suspected no . 4 heroin and adulterated substances in yau oi estate , tuen mun
警方于行动中在屯门友爱?检获一支内有五发子弹的七点六二口径手枪，以及二点二公斤怀疑四号海洛英与稀释物料，并拘捕该两男两女。