ball n.球,舞会,球状物vt.捏成...a ball of fortune 受命运摆布的人...ball pen 圆珠笔...ball race 滚珠座圈...ball-flower n.圆球饰...hair ball 毛团,毛粪石(胃肠内)...wool ball 羊毛团...ball packing 球(状)填充物...ball float trap 浮球式冷凝水排除器...keep one's eye on the ball 警惕...game ball 决胜球,决胜分...food ball 植物粪石...radial ball bearing 径向滚珠轴承...ball-point n.圆珠笔...ball peeen hammer 球头锤...keep the ball rolling 使不中断...ball non-return valve 球形止回阀...ball pressure test 球压式试验;球压式硬度试验...ball-thrombus 球状血栓...ball-and-roller bearing 滚珠与滚子轴承,减磨轴承...ball cock 浮球阀球阀;球心阀...
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