这把尺子长30厘米。

This ruler is 30 cm long.

这把尺子有30厘米长。

This ruler is 30 centimeters long.

这把尺子有公制和英制单位。

The ruler has both metric and imperial units.

别人借给我这把尺子。

I was lent this ruler.

这把尺子只有厘米刻度。

The ruler is 30 centimetres long.

这把尺子是厘米刻度吗？

Is this ruler graduated in centimeters?

这把尺子的最小单位是毫米。

The minimum unit of the ruler is mm.

这把尺子有厘米和英寸两种刻度。

This ruler has only one scale in centimetres.

这把尺子给高山。

This ruler is for Gao Shan.

嘿，这把尺子是什么颜色的？浅绿色。对啦，这是浅绿色的，这是一把浅绿色的尺子。哦，当心！

Hey, what colour is the ruler? Light green. Yeah, it's light green. It's a light green ruler. Oh, be careful!