In many countries today, drug abuse is public enemy number one. 在许多国家,嗜毒是头号公敌。Drug abuse is one of the country's least tractable social problems.嗜毒是这个国家最难解决的社会问题之一。Murphy gradually slid into a pattern of drug abuse.墨菲逐渐染上了嗜毒的恶习。He began to show signs of alcohol and drug dependency.他开始表现出酗酒嗜毒的迹象。