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.
清两轮将牌，出红心，当东将吃后，他只能出到你的梅花间张。
After two rounds of trumps you just switch to hearts, and when East ruffs he has to lead into the club tenace.
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