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・an ascending [a descending] part [portion] of a trajectory 弾道の昇弧[降弧].🔗🔉

・an ascending [a descending] part [portion] of a trajectory 弾道の昇弧[降弧].

研究社新英和大辞典 ページ 229757 での・an ascending [a descending] part [portion] of a trajectory 弾道の昇弧[降弧].単語。