教师一边讲课一边燥

In two consecutive days, Ning Cheng selectively blasted away thousands of stone peaks. Except for a piece of divine stone marrow obtained from the three-thousand-foot stone peak, he did not see any divine stone marrow in the stone peaks that were later blasted open. Among them, he also smashed a stone peak of about three thousand feet, but there was still no divine stone marrow....