sand lump crushing

例句：

1. 1. The sand was so hard that ittook a lot of effort to crush it.
   沙子很硬，需要很大的力气才能压碎。
2. 2. The rock was too big tocrush with our hands.
   这块岩石太大，我们用手无法压碎。
3. 3. Theworkers were crushed by theheavy machinery.
   工人们被重型机械压碎了。