fireguard的复数形式怎么写？

fireguard的音标：fireguard的英式发音音标为：['faɪəgɑ:d]fireguard的美式发音音标为：['faɪərgɑrd]...

n.围火炉的铁丝网，火炉栏...

She stumbled against the fireguard and her nightdress caught fire.她在炉栏边被摔了一下,睡衣着火了.A fireguard prevents children getting near the fire.炉挡防止孩子们靠近炉火....