late 14c., from Old French diametre, from Latin diametrus, from Greek diametros (gramme) "diagonal of a circle," from dia- "across, through" (see dia-) + metron "a measure" (see meter (n.2)).
实用例句
1. This hole was a scant .23 inches in diameter.
这个洞眼的直径只有0.23英寸。
来自柯林斯例句
2. the diameter of a tree trunk
树干的直径
来自《权威词典》
3. A diameter passes through the center of a circle.
直径从圆心穿过.
来自《简明英汉词典》
4. The diameter and the circumference of a circle correlate.