前者：“在雪下面”：there is dry land under the snow.雪下覆盖着干涸的土地.
后者：“淋雪,冒雪”：I was caught in the heavy snow yesterday.昨天我遇上大雪了.
其他可根据上下文和语境.如果在这个句子中应如何理解？"When it snows ,our garden loooks very beautiful under the snow,and it is nice to play in the snow."哦，under the snow 可以译成：在大雪映衬或在飘洒的雪中，。。。。play in the snow 就是在雪中玩耍。