Based on the previous research results related, the relationships between sand-ridge resistance, total resistance, ice-period resistance and water flow intensity are established respectively.
在前人研究的基础上，分别建立了沙垅阻力、总阻力、冰期阻力与水流强度间的关系。
2
The atolls are composed of live coral reefs and sand bars, situated atop a submarine ridge 960 kilometers long that rises abruptly from the depths of the Indian Ocean and runs from north to south.
环礁由活着的珊瑚礁和沙洲组成，生长在印度洋深处从南到北长贯960公里的陡峭海脊之上。
3
The towering ridge of a sand dune in the Arabian Desert points to the afternoon sun.