double-decker的复数形式怎么写？

n.双层电汽车，双层甲板船，双层夹心三明治...

And that one looks like a double - decker bus with a rabbit on top.那个看起来像 双层 巴士顶上的兔子.Each face is the size of a double - decker bus.钟的每一面都犹如 双层 大巴一样宽.Freda: What can you see a tram or a double - decker ?弗蕾达: 你可以看到有轨电车或 双...

double-decker的音标：double-decker的英式发音音标为：['dʌbl'dekə]double-decker的美式发音音标为：['dʌbəl'dɛkɚ]...