barchane

基本解釋

Another kind of dunes are barchan dunes.
還有一種類型叫做弧形沙丘。
Parabolic dunes are the opposite of barchan dunes.
新月型沙丘則跟弧形沙丘相反。
Barchan dunes are produced by strong winds blowing across a level surface and are crescent shaped.
強風(fēng)吹過表面形成弧形沙丘而就是新月形。
A large barchan (crescent-shaped) dune, in a region where some dunes have been observed shrinking over several years.
大型新月形（月牙形）沙丘在一個地區(qū)，那里的一些沙丘已經(jīng)觀察幾年縮小。
The scattered single barchan dunes on the non sand bed possess movability and form unstability except the high large crescent sand mountain.
非沙質(zhì)床面零星分布的單個新月形沙丘具有明顯的移動性和形態(tài)的不穩(wěn)定性（高大新月形沙山除外）。