A cube.立方体
A cube is a 3 dimensional object with equal sides.   /'ɑbdʒɛkt/ 
立方体是一个边长相等的三维物体。

A circle.圆形
A circle has a radius and a diameter.   90
圆有半径和直径。

A sphere.球形
A sphere is round and has the shape of a ball.   91
球体是圆的，有球的形状。

Perpendicular lines.互相垂直的线
Perpendicular lines meet at a 90-degree angle. 
垂直线以90度角相交。

Area. /ˈeriə/面积
The area of a rectangle is its length times its width. 86（times：乘）
矩形的面积是它的长度乘以它的宽度。

Volume. /'vɑljum/ 体积
The volume of a cube is its length times its width times its height.  90
立方体的体积是它的长度乘以它的宽度乘以它的高度。

Fingers.
We have 5 fingers on each hand. 我们每只手有五个手指。
We use our fingers to hold things. 我们用手指拿住东西。

Toes.
We have 5 toes on each foot. 我们每只脚有5个脚趾。  95
They are at the end of each foot. 它们在每只脚的末端。（at the end of在...的末端，尽头）

Legs.
We use our legs to walk.我们用腿走路。   87
Our feet are at the end of each leg. 我们的脚在每条腿的末端。

Arms.
We use our arms to carry things.我们用胳膊拿东西。92
Our hands are at the end of each arm. 我们的手在每只手臂的末端。

Teeth.
Our teeth are in our mouth. 我们的牙齿在嘴里。
We use our teeth to chew food.我们用牙齿咀嚼食物。91

讲解：
shape：n.①（物体的）形状，②（人的）身形、模样
cube：立方体→Water Cube水立方→Rubik's Cube魔方
dimensional ：维度→dimensional...维的→3D电影：three-dimensional film
carry：拿，搬，扛，提，抱→she is carrying her baby in her arms她的怀里正抱着宝宝
chew：咀嚼→chew gum嚼口香糖