1
a trapezium
trapezium 指不规则四边形，美式英语中通常指梯形，但此处按英式用法。
The garden is designed as a trapezium.
花园被设计成一个不规则四边形。
无平行边的四边形；不规则四边形
先理解核心含义，再看它在真实句子里的用法。
无平行边的四边形；不规则四边形
a four-sided shape with no parallel sides
The garden is designed as a trapezium.
花园被设计成一个不规则四边形。
美式英语中指无平行边的四边形；英式英语中trapezium常指梯形（即美式英语的trapezoid）。
手腕的梯形骨。
The trapezium bone of the wrist.
没有平行边的四边形
a quadrilateral with no parallel sides
脑腹侧区域,位于脑桥后方或覆盖其横纤维。
A region on the ventral side of the brain, either just back of the pons Varolii, or, as in man, covered by the posterior extension of its transverse fibers.
猎户座中的多星系统
a multiple star in the constellation of Orion
The math teacher drew a trapezium on the board and asked us to label its four angles.
数学老师在黑板上画了一个无平行边的四边形，让我们标出它的四个角。
This woodworking project starts with cutting a trapezium from a sheet of plywood.
这个木工项目首先要从一块胶合板上切出一个无平行边的四边形。
If both pairs of opposite sides are parallel, then the shape is not a trapezium.
如果两对对边都平行，那么这个形状就不是无平行边的四边形。
trapezium 指不规则四边形，美式英语中通常指梯形，但此处按英式用法。
The garden is designed as a trapezium.
花园被设计成一个不规则四边形。
The table has the shape of a trapezium.
这张桌子形状为不规则四边形。
trapezium-shaped 是复合形容词，修饰名词。
They built a trapezium-shaped pond.
他们建了一个不规则四边形池塘。
Not this
A trapezium is a quadrilateral with one pair of parallel sides.
Use this
A trapezium is a quadrilateral with no parallel sides.
由于中文中'梯形'通常指有一组平行边的四边形，学生容易将trapezium误用于描述有平行边的形状。实际上，根据词典定义，trapezium是没有平行边的四边形，而有平行边的四边形应称为trapezoid。
Not this
I drew two trapezium in the diagram.
Use this
I drew two trapeziums in the diagram.
Trapezium是可数名词，复数形式为trapeziums或trapezia。学生可能忘记改变复数形式，导致语法错误。正确使用复数形式才能表达多个。
Choose the next layer that will help you use trapezium with more confidence.
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Revisit a common error or keep this word in your review list.
不规则四边形是可数名词。
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.