Fill in the blanks with an appropriate preposition based on word conversion.大约半数医药生产将会依赖纳米技术——在10到15年内每年的影响将超过1800亿美元。About half of all production will depend on nanotechnology-affecting___$180 billion per year in 10 to 15 years. 答案: over对等概念与词汇翻译