Louisiana officials want to start building sand berms as barrier islands, to block oil from entering the fragile marsh ecosystems;
路易斯安那州官员希望开始建造作为屏障的沙堤来阻止石油侵入脆弱的沼泽生态系统；
2
In Louisiana, temporary sand berms are being built to protect barrier islands.
在路易斯安那州，人们已经用沙袋搭建起临时堤坝，来保护沿岸的岛屿。
3
The sand ground temperature is higher obviously than clay straw barrier ground and the leaf surface of natural desert plants under the same conditions of sunlight, time and the area.