developmentsn.建设；发展；开发区名词development的复数形式.developmentn.发展；开发；生长；进展；[摄]显影；新开发区development zones开发区development clock发育钟developmental lag发展迟滞,发展迟滞发展迟滞developmental way发展途径development table研制台development board开发板development index[气]发展[发育]指数Development trail路径development ratio发展比率development steel拓展用钢种