Hillen.希勒hilln.小山；丘陵；山冈；斜坡vt.堆起；培土hills hidden in mist隐在雾中的小山Hill Blue Flycatchern.山蓝仙鹟hills rising steeply陡峭的群山hill climbing method爬山法hill drainage plough坡地排水沟犁hill-top take-off山顶滑翔起点hill-drop mechanism多粒穴播排种机构hill and gully region黄土丘陵沟壑区hill climbing ability上坡能力hill climbing process爬山过程