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1.slightly adv.轻微地，轻轻地
In most languages adjectives have slightly different spellings for masculine and feminine.
在多数语言中，形容词的阳性和阴性的拼法略为不同。
2.hospitalization n.医院收容，住院治疗
Occa-sionally hospitalization is required to combat dehydration.
有时病人必须住院以防脱水。
3.mortality n.死亡数，死亡率
Premature birth is the main cause of perinatal mortality.
早产是临产死亡的主要原因。
4.approximately adv.近似地，大约
Approximately $150 million is to be spent on improvements.
大约1.5亿美元将用于作出改善。
