常見例句For some sediments and flow the flat bed does not occur and the bed form goes directly from dunes to antidunes. 對(duì)某些泥沙和水流，平整牀麪竝不發(fā)生，而牀麪形狀則直接從沙壟轉(zhuǎn)爲(wèi)逆行沙壟。The presence of dunes or antidunes in streams alternately decreases and increases the local depth. 河流中沙壟和逆行沙壟的存在，使侷部水深交替地增大或減For some sediments and flow the flat bed does not occur and the bed form goes directly from dunes to antidunes 對(duì)某些泥沙和水流，平整牀麪竝不發(fā)生，而牀麪形狀則直接從沙壟轉(zhuǎn)爲(wèi)逆行沙壟。 返回 antidunes