n.

1. 一种大桶（容量自238至530公升不等）
2. 若干种容积单位的通称，常相当于238公升

n.

1. a large cask.
2. a measure of liquid volume equal to 52.5 imperial gallons (63 US gallons, 238.7 litres) for wine or 54 imperial gallons (64 US gallons, 245.5 litres) for beer.