估计: estimate; evaluate; take stock of; size up; calculate; appraise; reckon; estimation; forecast 短语和例子大致估计 rude estimates; 非常乐观的估计 a very optimistic estimate; 照我的估计 by my reckoning; 据保守的估计 on
变量: [数学] variable; variable quantity; alternating quantity◇变量范围 range of variables; variable range; 变量函数 variable function; 变量系数 variation coefficient