以 b 开头的数学词汇 | 玄数

2012-10-05
balance   平衡
A situation in which different things exist in equal, correct or good amounts.balance scales   天平
An instrument for weighing things, with a bar that is supported in the middle and has dishes hanging from each end.
balance

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

base   底面; 根

  • The line or surface forming the part of a figure that is most nearly horizontal or on which it is supposed to stand.
  • The number that is raised to various powers to generate the principal counting units of a number system. Thebase of the decimal system.
    number system
    number system
  • The number raised to the logarithm of a designated number in order to produce that designated number; the number at which a chosen logarithmic scale has the value 1.

base ten system   十进制数字系统

12345 = 1×105 + 2×104 + 3×103 + 4×102 + 5×100

391.47 = 3×103 + 9×102 + 1×100 + 4×10–1 + 7×10–2


benchmark angles   基准角
Angles such as 45°, 90°, 180°, 270° … , that can be used as references.
角度与弧度对照

billion   十亿
One thousand million: 1 000 000 000, 109.

binary   二进制
Relating to a system of numerical notation to the base 2, in which each place of a number, expressed as 0 or 1, corresponds to a power of 2.

1002(100B)、             11010.112(11010.11B)
7 = 22 + 21 + 20
9 = 23 + 0 + 0 + 20