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The path taken by a projected body which is acted upon only by gravitational forces and the resistance of the medium through which it passes.
1950s; earliest use found in Royal Air Force Flying Review.
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。