Uncle Sebastian used to tease Mother and Daddy unmercifully that all they could produce was girls.塞巴斯蒂安叔叔过去常无情地嘲讽爸爸和妈妈，说他们只会生女儿。Look at the numbers of small businesses that are being hammered unmercifully.看看有多少小企业正在遭受无情的打击。They taunted him unmercifully.他们无情地挖苦了他一顿。