development是名词,表达一定的概念,developing是动词develop的一种变化形式（动名词/现在分词）.developing作为动名词用时,泛指一种行为,作为现在分词用时,强调一个正在进行的动作.例如;The government is encouraging the development of small business./ He is devoted to developng the country./ China is a developing country.