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An expanse of some material used as a sign to indicate the position of ground troops to friendly aircraft.
Early 20th century; earliest use found in Edward Samuel Farrow (1855–1926).
雅致网英汉双解词典包含236457条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。