主题：就达雅兄的备战经济说几句，兼及改革三十年（窘给大家道歉） -- 葡萄
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The "high" T_c here is just a "relative" noun corresponding to the "low" T_c. One important task in condensed matter physics is trying to find room-temperature superconductivity, and the room temperature is usually also called as "normal temperature".
