изучать вопрос(Boris studied very diligently and covered the ground thoroughly. Борис занимается очень прилежно и изучил вопрос основательно. Сomandor)
стереть в пыль("Camp dust" refers to notorious security chief Lavrenty Beria's preferred form of threat when interrogating prisoners: "sotru v lagernuyu pil!" (I'll grind you down into camp dust! VLZ_58)