The tiny grains of methane  that form the dunes are much lighter than sand, and in Pluto's low gravity, would likely  feel like dust spilling through your fingers.

形成沙丘的微小甲烷颗粒比沙子轻得多，在冥王星的低重力作用下， 它们可能感觉就像灰尘从手指间溢出。