oil painting的复数形式怎么拼写？

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。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。Oil painting is to be appreciated at a ...

oil painting的音标：oil painting的英式发音音标为：[ɔil 'peintiŋ]oil painting的美式发音音标为：[ɔɪl 'pentɪŋ]...

油画...