As you walk through the quicksand or slide down a sand mountain, sometimes you can hear loud noises from beneath your feet.

在流沙中行走或从沙山滑落沙粒，都会发出巨大声响。

Hermione was going skiing with her parents, something that greatly amused Ron, who had never heard of Muggles strapping narrow strips of wood on to their feet to slide down mountains.

赫敏要跟父母去滑雪，罗恩觉得非常有趣，他从没听说过麻瓜把木条绑在脚上从山上滑下去。