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词汇	directrix
释义	di·rec·trix AHD[dĭ-rĕkʹtrĭks, dī-] D.J.[dɪˈrektrɪks, daɪ-]K.K.[dɪˈrɛktrɪks, daɪ-]n.（名词）【复数】 di.rec.trix.es 或 di.rec.tri.ces [dī'rĕk-trīʹsēz] The directrix at both ends of this general cylinder prints red.Clarinda/Academy Artworks Mathematics The fixed curve traversed by a generatrix in generating a conic section or a cylinder.【数学】 准线：穿过产生圆锥部分或圆柱的母线而形成的固定曲线 The median line in the trajectory of fire of an artillery piece.中线：一门大炮开火的轨迹中线
随便看	thyroidectomies thyroidectomy thyroid gland thyroid hormone thyroiditis thyroids thyroid-stimulating hormone thyroid–stimulating hormone thyrotoxicosis thyrotropin thyrotropin-releasing hormone thyrotropin–releasing factor thyrotropin–releasing hormone thyroxin thyroxine thyroxines thyrse thyrses thyrsi thyrsi thyrsoid thyrsus thysanuran thyself THz

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