例文・使い方で印象づける「balloonists」の覚え方
スポンサーリンク...For balloonists such an instrument wouldsometimes be useful, as showing the elevation independently of thebarometer, whenever any portion of the sea-horizon was in view... 
Richard A. Proctor 「Myths and Marvels of Astronomy」
ランダム例文：
berate office affording
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この漢字は何でしょう？？