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                ferrule的现在完成时为:ferruled... 
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                ferrule的音标:ferrule的英式发音音标为:['feru:l]ferrule的美式发音音标为:['ferəl]... 
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                ferrule的第三人称单数(三单)为:ferrules... 
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                ferrule的一般过去时为:ferruled... 
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                n.(棍棒顶端等的)金属箍,金属环,套圈vt.装以金属铁... 
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                Its ferrule followed lightly on the path, squealing at his heels.手杖上的金属包头沿着小径轻快地跟随着他, 在他的脚后跟吱吱作响.A ferrule and eraser are crimped into place on each pencil.金属环把橡皮头固定到每一根铅笔上.The tapered legs, each fitted with a brass ferr... 
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                ferrule的复数形式为:ferrules...