The ruler cracked and splintered into pieces

　　尺子裂開了，碎成了小片。

　　This ruler has one scale in centimetres and another in inches.

　　這把尺子有厘米和英寸兩種刻度。

　　This ruler has only one scale in centimetres.

　　這把尺子只有厘米刻度。

　　There is a pen, a knife and a ruler in the box.

　　盒子里有一支鋼筆，一把小刀和一把尺子。

　　This ruler has a scale in centimetres.

　　這把尺子的'刻度是用厘米表示的。