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Diameter
02
直径
a straight line connecting the center of a circle with two points on its perimeter (or the center of a sphere with two points on its surface)
例子
The Milky Way galaxy has a diameter of tens of thousands of parsecs.
The size of the pizza is 12 inches in diameter.
The diameter of the wire is measured in millimeters.
The old oak tree had an enormous bole nearly 6 feet in diameter at its base.
The machinist used a caliper to measure the diameter of the metal rod.