“肺叶”用英语怎么说？

他的其中一片肺叶完全不起作用了。One of his lungs gave out entirely.默尔西河和克莱德湾成了我们赖以呼吸的肺叶.The Mersey, the Clyde were the lungs through which we breathed.肺叶随着那阀门翕张,带动膝盖的反射弹动.And then my lungs will shudder with unstoppable knee jerks....