Hillen.希勒
hilln.小山;丘陵;山冈;斜坡vt.堆起;培土
Hills along the river city沿江丘陵城市
Hills melt into the sky.群山渐渐没入天际。
hills shrouded in darkness黑暗中隐约可见的山峦
hill differential equation希耳微分方程
Hills are folded in mist.群山为雾所笼罩。
hill-and-dale recording深划录音,垂直录声,竖向录音
hills covered with pinetrees青松覆盖的山峦