Each one contains 80,000 gallons of light crude oil.

每罐装有80,000加仑轻质原油。

However, both of them are benchmarks for light crude oil trading, most of the crude oil imported to China is medium.

然而，这两个基准主要是为轻质原油贸易制定，进口到中国的则大部分是中质原油。