a straight line from one side of a round object, particularly a circle, passing through the center and joining the other side

直径, 直线直径
the length of a straight line drawn from the center of a circle to any point on its outer boundary

半径, 半径长度
the relation between two amounts indicating how much larger one value is than the other

比率, 比例
(mathematics) a number less than one, called a fraction, that is represented as a period followed by the number of tenths, hundredths, etc.

小数, 十进制数
(mathematics) a quantity whose value changes according to another quantity's varying value

函数, 可变数量
a number that indicates the position of something in a sequence, such as third, second, etc.

序数, 序号
each of the two symbols [ ] used to indicate that the enclosed numbers or words should be considered separately

方括号, 中括号
(geometry) a shape that is not two-dimensional because it has height, width, and length

立体, 固体
a standard of measurement that is based on the kilogram, the meter, and the liter

公制系统, 米制
a unit for measuring oil and beer that equals 42 US gallons or 35 imperial gallons for oil and 36 imperial gallons for beer

桶, 油桶
a measure equal to 16 fluid ounces, often used for measuring liquids such as beer or milk

品脱, 一品脱
a unit of volume measurement the United States for liquids, equal to 32 fluid ounces or approximately 946 milliliters

夸脱, 夸特
a set or group of twenty or approximately twenty people or things

二十个, 一组二十
the distance traveled in miles in relation to the time passed when doing so

每小时英里数, 英里每小时
