N-COUNT
升（米制容量单位，等于1.76英国品脱或2.11美国品脱）
A litre is a metric unit of volume that is a thousand cubic centimetres. It is equal to 1.76 British pints or 2.11 American pints.
例句
...15 litres of water...
15升水
This tax would raise petrol prices by about 3.5p per litre.
这项税收会使每升汽油价格提高约3.5便士。