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单词
one-in-sixty rule
释义
one-in-sixty rule
one-in-sixty rule
This rule says that one unit of distance subtends an angle of one degree at 60 units of distance. For example, a chord of 5 miles will subtend an angle of 5° at 60 miles and 2½° at 120 miles. Also called the
rule of sixty
.
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更新时间:2026/5/8 4:11:14