English | 玄数

abscissa 横坐标
In plane Cartesian coordinates, the x-coordinate of a point: its position from the origin (y axis) measured parallel to the x-axis.


bar chart / bar graph  条形图
A diagram that uses lines or narrow rectangles(= bars) of different heights (but equal widths) to show different amounts, so that they can be compared.
bar chart


congruent     全等
Having the same size and shape.
congruent triangles


decimal number system   十进制数字系统
A positional system of numeration that uses decimal digits and a base of ten.
number system


exponential function   指数函数
The function of the form like: y = ax.
Exponential Function


factoring   因式分解
The act or process of separating an equation, formula, cryptogram, etc., into its component parts.
24 = 2 * 3 * 4
ax + ay + bx + by = (a + b) (x + y)


geometric sequence 等比数列
A series of numbers in which each is multiplied by a fixed number to produce the next. Like:
1, 2, 4, 8, 16 … …
1, 0.1, 0.01, 0.001, 0.0001 … …


hyperbola     双曲线
A conic section formed by a point that moves in a plane so that the difference in its distance from two fixed points in the plane remains constant.
| M1F1 | – | M1F2 |  =  | M2F1 | – | M2F2 |  =  | M3F1 | – | M3F2 | =  …… = Constant


number system   数制
Any system of naming or representing numbers, as the decimal system or the binary system.
number system
number system