评论
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1.typical of 是..特征
例句：This poem is typical of the Romantic period.
这首诗具有浪漫主义时期的特点。
2.based on 以…为依据
例句：The selection process is based on rigorous tests of competence and experience.
选拔过程是基于对能力和经验的严格测试。
3.immune system 免疫系统
例句：The patient's immune system would reject the transplanted organ as a foreign object.
病人的免疫系统会对移植器官产生异质排斥反应。
4.arise from 产生于
例句：Noisome vapours arise from the mud left in the docks
难闻的蒸汽由船坞中余留的泥浆散发出来。
