benign;virtuous;beneficial; benevolent;positive;favorable 两国自然有一些竞争，但这种竞争是～的，有利于促进彼此的提高。Naturally,there is some competition between the two countries.But such competition is positive (or benevolent)in nature and helps each other’s development./国民经济的～循环virtuous circle in national economy/～肿瘤benign tumor/～循环virtuous circle;beneficial cycle