SAT
数字化SAT学习词汇：数学术语、语境词汇和语法，用简明英语和8种语言解释。AUSLEX与College Board无关。
已审核词条
372 个词条先从数学英语术语开始：许多学生会做数学题，却因英文表述失分。语境词汇、语法规则卡和原创练习题正在陆续添加。SAT是College Board的商标，最新考试信息请查看官网。
数字化SAT一览
| 阅读与写作 | 54题，两个32分钟模块（共64分钟）；每题配一篇短文。 |
|---|---|
| 数学 | 44题，两个35分钟模块（共70分钟）；所有题目都可用计算器（内置Desmos）；部分题需自行填写答案。 |
| 总计 | 2小时14分钟，另有10分钟休息；每部分第二模块根据第一模块表现调整难度；总分400–1600。 |
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正比例关系
A relationship where two quantities have a constant ratio, so y = kx.
Distance and time are in a proportional relationship at constant speed.
在匀速时，距离和时间成正比例关系。propose
verb提出
To suggest an idea or plan for others to consider.
The author proposes a new explanation for the pattern.
作者对这一规律提出了新的解释。provoke
verb引发
To cause a reaction, especially a strong one.
The proposal provoked fierce debate.
这项提议引发了激烈争论。勾股定理
In a right triangle, a² + b² = c², where c is the hypotenuse.
By the Pythagorean theorem, 3² + 4² = 5².
根据勾股定理，3² + 4² = 5²。二次方程
An equation with x² as the highest power, such as x² − 5x + 6 = 0.
The quadratic equation has two solutions.
这个二次方程有两个解。求根公式
The formula x = (−b ± √(b² − 4ac)) / 2a for solving quadratic equations.
Use the quadratic formula when factorising is difficult.
因式分解困难时，用求根公式。二次函数
A function of the form f(x) = ax² + bx + c, whose graph is a parabola.
The quadratic function has a maximum value.
这个二次函数有最大值。quadrilateral
noun四边形
A polygon with four sides.
The angles of a quadrilateral add up to 360°.
四边形的内角和是360°。
qualify
verb限定（说法）
In context: to limit or add conditions to a statement so it is less absolute.
The author qualifies her claim by noting that the data are incomplete.
作者指出数据不完整，从而对自己的说法加以限定。quartile
noun四分位数
One of three values that divide ordered data into four equal parts.
The first quartile is 12.
第一四分位数是12。quotient
noun商
The result of dividing one number by another.
The quotient of 20 and 4 is 5.
20除以4的商是5。radian
noun弧度
A unit for measuring angles; π radians equals 180 degrees.
90 degrees is π/2 radians.
90度等于π/2弧度。radical
noun根式
In maths, an expression with a root sign (√), such as √5 or ∛x.
Simplify the radical √50 to 5√2.
把根式√50化简为5√2。radical equation
noun根式方程
An equation with a variable inside a root sign.
Check answers to a radical equation for extra solutions.
检查根式方程的答案是否有增根。radius
noun半径
The distance from the centre of a circle to its edge.
The radius is half the diameter.
半径是直径的一半。随机分配
Placing participants into groups by chance in an experiment.
Random assignment allows cause-and-effect conclusions.
随机分配使因果结论成为可能。random sample
noun随机样本
A sample where every member of the population has an equal chance of being chosen.
A random sample allows conclusions about the whole population.
随机样本可以推断整个总体。range
noun值域；极差
In maths, the set of all output values of a function; in statistics, the largest value minus the smallest.
The range of the data set is 12.
这组数据的极差是12。rate
noun比率，速率
A comparison of two quantities with different units, such as kilometres per hour.
The car travels at a rate of 60 km per hour.
这辆车以每小时60公里的速度行驶。比率
The relationship between two amounts, shown as two numbers.
The student-teacher ratio is 25 to 1.
师生比为25比1。有理式
A fraction whose numerator and denominator are polynomials.
Simplify the rational expression (x² − 1)/(x − 1).
化简有理式(x² − 1)/(x − 1)。rational number
noun有理数
A number that can be written as a fraction of two integers, such as 3/4 or −2.
0.75 is a rational number because it equals 3/4.
0.75是有理数，因为它等于3/4。real number
noun实数
Any number on the number line, including rational and irrational numbers.
For all real numbers x, x² is never negative.
对所有实数x，x²都不是负数。reciprocal
noun倒数
The number you multiply by to get 1; for a fraction, flip the numerator and denominator.
The reciprocal of 2/3 is 3/2.
2/3的倒数是3/2。reconcile
verb调和
To make two different ideas or facts fit together.
The theory cannot reconcile the two sets of results.
该理论无法调和这两组结果。