1.【数】弧度
1.a unit of angular measurement equivalent to the angle between two radii that enclose a section of a circle's circumference equal in length to the length of a radius.
1.Its surface (both the front side and the back side) is beaten into irregular radians , changing unevenly like cloud and mist.
它的表面（前后两面）被敲打成不规则的弧度，凹凸不一，有如云雾之变化。
2.Notice that the formula involves the use of the exponential function, and that the angles must be in radians.
请注意公式中所用的函数，以及所有的角度都必须在弧度中。
3.Returns the trigonometric sine of the specified angle, in radians, and in an approximate numeric, float, expression.
以近似数字（float）表达式返回指定角度（以弧度为单位）的三角正弦值。
4.The hobbing gears are the speed-regulating hobbing gears with radians, and namely the gear peaks are manufactured into the arc form.
所述的滚齿为带有弧度的可调速滚齿，即：其齿峰加工成弧形。
5.Is a mathematical function that returns the trigonometric cosine of the specified angle, in radians, in the specified expression.
一个数学函数，返回指定表达式中以弧度表示的指定角的三角余弦。
6.where the angles are given in degrees for convenience although, strictly, they should be expressed in radians.
其中的角度给出了学位，但为了方便，严格，应以弧度表示。
7.Mathematic function that returns the trigonometric cotangent of the specified angle, in radians, in the given float expression.
在给定float表达式中以弧度形式返回给定角度的三角余切的数学函数。
8.Returns the angle, in radians, whose tangent is the quotient of two given float expressions.
返回以弧度表示的角度，其正切为两个给定float表达式的商。
9.On the Math IC, it is sometimes a better idea to work solely in radians , rather than convert back and forth between radians and degrees.
在数学上，单独使用弧度来计算比弧度与度数之间来回转换更好一些。
10.the space between two lines or planes that intersect; the inclination of one line to another; measured in degrees or radians.
两个相交的线或平面之间的空间；一个线对另一个线的倾斜；用角度或弧度衡量。