natural barrier meaning in English
天然堤
天然屏障
自然障碍
Examples
- The last great natural barrier in western germany had been crossed .
德国西部最后一个天堑就这样越过了。 - Healthy, skin, mucous membranes, and cilia are natural barriers to many viruses .
健康的皮肤，粘膜和纤毛是许多病毒的天然屏障。 - The cable system is ideal for spanning natural barriers of wide rivers, deep valleys, or ravines .
这种钢索体系是跨越宽河道、深丘谷或深山谷天然障碍物的理想体系。 - South there isyuhua natural barrier ,
内有藏兵洞 - The sahara desert is a natural barrier between north and central africa
撒哈拉沙漠是北非与中非之间的天然屏障。