vt.& vi. 伸开;展开;(使)传播;(使)散布;
n. 范围;连续的一段时间;
vt. 涂;把…覆盖在…上(over);把…敲平;散发(气、烟等);
vi. (景色、景致)展现;传开;(人群)散开;软化;
adj. 张开的;[语言学]双唇展开的;(宝石)扁薄发光的;(文章、照片等)跨两栏(或多栏)的;
and near its lower reaches there is a long tailing-off which is almost certainly the result of material transported out to deep water after being eroded from the continental masses.