A sharp crack might remain fairly sharp in granite, but degenerate into a dull thud in sand.

在花岗岩中尖锐的破裂声可以保留相当的强度，而在砂岩中则易变成低沉的轰响。

youdao

The use of the whole resin, the electrostatic process of sand, sand sharp durable surface.

采用全树脂、静电植砂工艺，砂面锋利耐用。

youdao

Even so, there were places she could not go - where the stones were too sharp or the sand too hot.

纵然如此，世上仍有她无法涉足的地方——那些地方或是布满尖锐的石头，或是地面沙子的温度过高。

youdao

In the vacuum, the sharp edges of the lunar soil cling together, leaving a smooth surface much as moist sand does on a beach.

MSN: No hoax: Moon landing stands as NASA's finest hour