angle point的用法和樣例：
例句
- The solid angle is this component divided by the square of the length of this line.
立體角就是這個(gè)分量除以這條線(xiàn)的長(cháng)度的平方。 - The ratio of the flux emitted within the solid angle defined by the beam spread, to the bare lamp flux.
由光束角限定的立體角內輻射出的光通量與裸光源光通量之比。
