(1) 面积的表示法
This is a room 20 by 30 feet.
= This is a room 20 feet by 30.
= This is a room 20×30 ft.
这是一个20英尺宽30英尺长的房间。
The room has an area of ten square meters.
=The area of the room is ten square meters.
=The room is ten square meters in area.
=The room covers an area of ten square meters. 这个房间的面积为10平方米。
(2) 体积的表示法
常用“基数词+长度名词+ by +基数词+宽度名词+ by +基数词+高度名词”表示，若长、宽、高的单位一致，则通常省略后两个单位名词。如：
The box is eight inches by six by five. 这个盒子长高、宽、高分别为8英寸、6英寸、6英寸。