By 1990 the number of illiterates among people above the age of 15 came down to 180 million,and the illiteracy rate dropped to 22.2 percent.是什么意思_By 1990 the number of illiterates among people above the age of 15 came down to 180 million,and the illiteracy rate dropped to 22.2 percent.在线翻译_英语_读音_用法_例句