十米

The garden is 30 metres long and 20 metres wide.

"这花园长三十,宽二十。"

This new model of drilling machine can bore through solid rock ten metres deep.

这台新型钻机能钻透十厚的坚固岩石。

I'll swim you 50 meters.

我要跟你赛五十。

Overpumping groundwater for drinking water and irrigation has caused water levels to decline by tens of metres in many regions, forcing people to use low-quality water for drinking.

过度抽取地做为饮用用来灌溉在许多地区已经使降了几十，迫使人们使用质量较差的来做为饮。