1. a three-dimensional closed surface such that every point on the surface is equidistant from the center. 
   表面上每个点到中心的距离都相等的一种三维的闭合表面。
2. any moraceous tree of the tropical genus Ficus; produces a closed pear-shaped receptacle that becomes fleshy and edible when mature. 
   热带榕属桑科树的任意一种，；产一种接近梨型的花托，成熟时变得肉厚，可食用。
3. type genus of the Branchiobdellidae: a small worm that lives on the gills or surface of a crayfish attached by a sucker. 
   蛭形蚓科的模式属；一种小的蠕虫，靠吸管吸附于小龙虾腮部或表面。
4. A surface of gesso. 
   涂有混合石膏粉的表面
5. The surface generated by a straight line intersecting and moving along a closed plane curve, the directrix, while remaining parallel to a fixed straight line that is not on or parallel to the plane of the directrix. 
   柱面一条直线与一个封闭的平面曲线相交及沿着平面曲线移动所形成的平面，准线则与一个不在此准线平面上或者不与此准线平面平行的固定直线保持平行

查看更多例句 相关情景会话