任何子类数据的修改都涉及两张表：超类的表和子类的表。
Also any data change on a subclass involves two tables: the super class table and the subclass table.
他不仅积累了超过9000张古色古香的明信片，而且还出版了一部重2.4千克的超规格的书来记录部分藏品。
He has not only amassed over 9, 000 antique and vintage postcards but has even published an oversized, 2.4kg book to document part of his collection.
南家再叫2S，这是所谓的超转移，承诺有四张红心支持，高限牌力，通常是有个双张。
South rebid two spades, a so-called superaccept promising four-card heart support, a maximum and, typically, a doubleton somewhere.
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