a litre of beer的用法和样例：
- A litre of beer costs 40 fen How much shall I get you?
- Pater drank off a whole litre of beer all at once.
- It was in the local language of Lingala, in which I could order a litre of beer but could not follow the ins and outs of a peace agreement with Congo's rebels.
- A litre of gas has less mass than a litre of water.
- Could you get a litre of water to survive me?