Grammar Note
可数名词，可用复数形式
长方体
先理解核心含义，再看它在真实句子里的用法。
长方体
a rectangular parallelepiped; a solid with six rectangular faces
The teacher asked us to calculate the volume of a cuboid with given dimensions.
老师让我们计算给定尺寸的长方体的体积。
与 cube（立方体）不同，长宽高可不相等
骰骨。
The cuboid bone.
长方体
a rectangular parallelepiped
六面体。
A hexahedron.
A brick is a typical example of a cuboid used in construction.
砖是建筑中使用的典型长方体例子。
In the packaging warehouse, boxes are stacked in the shape of large cuboids.
在包装仓库里，盒子被堆成大型长方体的形状。
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可数名词，可用复数形式
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.