梯形的英文：
echelon
trapezium
trapezoid

参考例句：

Adjust keystoning from -63 to +64
-63至+64调节梯形角

Trapezoidal thread gauges
梯形螺纹量规

Adjust keystone angle
调节梯形角度

Gauges for metric trapezoidal scerew threads--Technical specifications
梯形螺纹量规技术条件

A trapezoid is a tetragon with two parallel sides.
梯形是具有两平行边的四边形。

Check if the digital keystone function is active. Adjust if necessary
检查数字梯形调整功能是否激活，必要时调整

The area of a trapezoid is equal to the product of its altitude and half the sum of its bases
梯形的面积等于其高与其两底和的一半的乘积。

The area of a trapezoid is equal to the product of its altitude and half the sum of its bases.
梯形的面积等于其高与其两底和的一半的乘积。

A long tapering spar slung to a mast to support and spread the head of a square sail,lugsail,or lateen.
帆桁吊在桅杆上一头渐细的长柱，用来支撑和展开横帆、梯形帆或三角帆的顶端

echelon是什么意思：
n. 梯形,梯阵,梯次编队
vt. 排成梯队
vi. 形成梯队

Because activities involving the system of rites and music was restricted to the upper echelons of society
因为礼乐完全是局限于社会上层的活动

The Armed Police Force has three echelons of leadership, namely, general headquarters, contingent (division) and detachment (regiment)
武警部队设总部、总队(师)、支队(团)三级领导机关。

Young whales and dolphins actually rest, eat and sleep while their mother swims, towing them along in her slipstream -a placement called echelon swimming.
小鲸鱼和小海豚实际上是当它们的母亲在滑流中拖着它们向前游动时休息、进食和睡觉的，形成一个游泳梯队的阵形。

trapezium是什么意思：
n. 不等边四边形，梯形，大多角骨

the Seine encumbered with boats, from the Port au Foin to Port-l'Ev阸ue,and you will have a confused picture of what the central trapezium of the Town was like in 1482.
从草料港到主教港，塞纳河上船只熙熙攘攘。 说到这里，新城的梯形中心地带在一四八二年是什么样子，想必您会有个模糊的印象吧。

trapezoid是什么意思：
n. 梯形,不等边四边形

A trapezoid is a tetragon with two parallel sides.
梯形是具有两平行边的四边形。

Gauges for metric trapezoidal scerew threads--Technical specifications
梯形螺纹量规技术条件

The area of a trapezoid is equal to the product of its altitude and half the sum of its bases
梯形的面积等于其高与其两底和的一半的乘积。