firebreak的复数形式怎么拼写？

So the effective structure of the firebreak belt in the ridge mountain was the sparse structure.所以,山脊防火林带的有效结构为疏透结构.The proofing efficiency is closely correlated with the wind weather area of the firebreak tree belt.防火林带...

firebreak的音标：firebreak的英式发音音标为：['faɪəbreɪk]firebreak的美式发音音标为：['faɪərbreɪk]...

n.防火道...