原文如下：
If these students are given unconnected units (say, tiles of a constant
length) and asked to demonstrate how to measure a length, some of them almost
always place the units against the object being measured in such a way that
the first and last tiles are lined up flush with the end of the object
measured, leaving spaces among the units in between.
我的翻譯如下：
如果學生使用不連續的單位為工具(例如等尺寸的磁磚)來丈量一段長度，
有些學生幾乎總是把這些單位緊密排列成直線，對齊被丈量物的頭尾，
.................(最後一句，怎麼翻都怪怪的...)
請諸位先進幫幫忙~~感恩！