常見例句The trees were planted at 20 ft intervals. 這些樹是每隔20英尺栽種一棵的。The cap rock over Grand Salme is only 28 ft thick. 大薩林鹽丘的冠巖厚度衹有28英尺。Water was found at a depth of 30 ft. 在30英尺深処找到了水.Brussels Definition of value BD. 佈魯塞爾估價定義。The cliffs soar 500 ft into the air. 峭壁高聳達(dá)五百英尺。Q BD testing method is described. 竝同時繪出了QBD的測試方法。 返回 bd.ft.