As the grinding goes on, the pieces get small. Over a long time, tiny grains of sand are made.
在风浪的冲刷下,这些碎粒被磨得越来越小,很久以后就形成了很小的沙粒。
2
Women once spent long hours grinding grain by hand.
妇女曾经在手工研磨谷物上花上大半天的时间。
3
Little did he imagine what that "help" would entail: a long, grinding war in which Libyan fighters waged lethal battles along the coast while NATO bombers pummeled the country from above.