need to have two different runtime type representations.
In a large office complex, long rows of employees sit in front of computer screens.
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针对器官移植与自身免疫病治疗，行业当前主要采用类固醇、钙调磷酸酶阻滞剂、抗代谢药物等广谱免疫抑制，相关药物会非选择性地抑制所有免疫细胞，过度抑制人体免疫功能，导致全身免疫反应缺陷，使患者易患机会性感染、侵袭性癌症等，并伴随多种严重与长期的副作用与并发症，从而严重影响患者的生存率和生活质量。
The Dutch ethical smartphone brand Fairphone is back with its six-generation Android, aiming to make its repairable phone more modern, modular, affordable and desirable, with screw-in accessories and a user-replaceable battery.