換位是關(guān)于算子應(yīng)該知道的最有用的事情之一.The commutant is one of the most useful things to know about an operator.這種角色換位決定了九江的市場(chǎng)空間和發(fā)展方向.The switchover determined the marketable roomage and developmental orientation in Jiujiang.輪胎定期換位能延長(zhǎng)其使用壽...