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error
n.錯誤，過失，誤差(mistake)
accuracy
n.精確性，正確度
angle
n.角；角度
formula
n.公式；規則
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，是對事實、規則、原理或其他邏輯關系的表達。
function
n.函數
In x=5y, x is a function of y.
在x=5y的等式中，x是y的函數。
addition
n.加法
divide
vt.分割；除
The woman's estate was divided among her children.
女人把房產分給了她的孩子。
multiply
v.乘；增加
subtract
vt.減去(deduct)
If you subtract 2 from 6, you get 4.
6減去2，得4.
adjacent
adj.鄰近的(neighboring);接近的
algebra
n.代數學
arithmetic
n.算術
Arithmetic as a basic school subject should be fun for starters.
作為基礎學科，算術對于初學者來說很有趣。
equation
n.等式；平衡
1+2=3 is a simple equation.
1+2=3是簡單的等式。
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難。
geometry
n.幾何學
circumference
n.圓周
The formulas for calculating the circumference of circle and triangle are different.
圓和三角形的周長計算公式是不同的。
