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error
n.错误，过失，误差(mistake)
accuracy
n.精确性，正确度
angle
n.角；角度
formula
n.公式；规则
Formula refers to a statement, especially an equation, of a fact, rule, principle, or other logical relation.
公式——尤其是方程式，是对事实、规则、原理或其他逻辑关系的表达。
function
n.函数
In x=5y, x is a function of y.
在x=5y的等式中，x是y的函数。
addition
n.加法
divide
vt.分割；除
The woman's estate was divided among her children.
女人把房产分给了她的孩子。
multiply
v.乘；增加
subtract
vt.减去(deduct)
If you subtract 2 from 6, you get 4.
6减去2，得4.
adjacent
adj.邻近的(neighboring);接近的
algebra
n.代数学
arithmetic
n.算术
Arithmetic as a basic school subject should be fun for starters.
作为基础学科，算术对于初学者来说很有趣。
equation
n.等式；平衡
1+2=3 is a simple equation.
1+2=3是简单的等式。
altitude
n.高度
At high altitudes of Tibet, it is difficult the breathe.
在西藏海拔很高的地方呼吸困难。
geometry
n.几何学
circumference
n.圆周
The formulas for calculating the circumference of circle and triangle are different.
圆和三角形的周长计算公式是不同的。
