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应该只是指围度,没有面积。你看下面的解释是any one of the three ...length, area, and volume.
dimentions 表示的是不是只有长度,比如dimentions of the area应该指的是长和宽,有两个围度所以用复数
. Mathematics
a. Any one of the three physical or spatial properties of length, area, and volume. In geometry, a point is said to have zero dimension; a figure having only length, such as a line, has one dimension; a plane or surface, two dimensions; and a figure having volume, three dimensions. The fourth dimension is often said to be time, as in the theory of general relativity. Higher dimensions can be dealt with mathematically but cannot be represented visually.
b. The measurement of a length, width, or thickness: The dimensions of the window are 2 feet by 4 feet.
2. A unit, such as mass, time, or charge, associated with a physical quantity and used as the basis for other measurements, such as acceleration. |
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