A tapestry is a special kind of weaving method in which the weft does not go continuously through the whole width of the fabric.

VOA: special.2009.11.04

And if you don't put a point but just put a number, this specifies the width of space that will be used by the number you're inserting there.

如果你不用点而只用数字，这个指定的长度是由,你插入的数字决定的。

哈佛公开课 - 计算机科学课程节选

This is a single fracture that is very small, like the width of a hair.

VOA: special.2009.02.04