是短语，意思是油画，例如：

1、Watercolour still seems somehow to be the poor relation of oil painting.水彩画似乎仍比油画略逊一筹。

2、The centre of attraction was Pierre Auguste Renoir's oil painting.最吸引人注意的是皮埃尔·奥古斯特·雷诺阿的油画。