sewing machine的复数形式怎么写

sewing machine的音标：sewing machine的英式发音音标为：['səʊɪŋ mə'ʃi:n]sewing machine的美式发音音标为：['soɪŋ mə'ʃin]...

She sewed the dresses on the sewing machine.她用缝纫机缝制了这些裙子。I have to pay 150 dollars for the sewing machine.我得花150美元买这台缝纫机.It's about time this old sewing machine was put out to pasture.这部旧缝纫机大概到了被淘汰的时候了....

n.缝纫机，锁线装订机...