常见例句双语例句The barrier function of intestinal tract always descents at different level after burned, including mechanical barrier, biologic barrier and immunologic barrier.烧伤后肠道三大屏障功能均有不同程度下降，包括肠粘膜机械屏障损害，出现粘膜糜烂及溃疡； 返回 biologic barrier