B1 [ U ] petroleum (= the black oil obtained from under the earth's surface from which petrol comes)石油,原油
B1 [ U ] a thick liquid that comes from petroleum, used as a fuel and for making parts of machines move easily燃油;润滑油
More examples
You should always check your oil, water and tyres before taking your car on a long trip.
Reports are just coming in of a major oil spillage in the North Sea.
Serve the pasta hot with a drizzle of olive oil.
The walls are covered in oil paintings.
The oil company was found guilty on ten counts of pollution, and was punished with a $250 million fine.
A2 [ C or U ] a smooth thick liquid produced from plants or animals that is used in cooking食用油
[ C or U ] a smooth thick liquid that is used to improve the appearance or quality of the skin or hair防护油;润肤油;护发油
thick paints with an oil base, used for painting pictures油画颜料
to put oil on something, especially a machine, usually to make it work more easily without sticking给(尤指机器)上油,给…上润滑油
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