adj.硬结的，长茧的，铁石心肠的，无情的
vt.（使）变硬，（使）起茧，（使）冷酷无情
The colonists massacred thousands of natives with brutal and callous force.
殖民者惨绝人寰地屠杀了成千的土著居民.
She was selfish, arrogant and often callous.
她自私傲慢,而且往往冷酷无情.
He is callous about the safety of his workers.
他对他工人的安全毫不关心.
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