难般聊聊
简明英汉词典 carry [�0�4k�0�3ri]vt.进位 【摘要】 进位carry 截尾truncation 四舍五入round 下舍入round down 上舍入round up 有效 数字significant digit 无效数字insignificant digit 代数algebra ...
Sissy有福相
If the digit is less than 5, round it down to 0; otherwise round it up to the next digit. round up：入，进位round down：舍去
