Phase-staterestoration is one of the methods usually used to solve this problem; but systematic study on the theories behind phase-staterestoration is lacking.
相态恢复方法是解决此问题的常用方法之一，但目前有关相态恢复理论的系统研究较少。
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Some important sites in Gujarat have recently undergone major restoration, and the state government announced in June last year that it plans to restore the stepwells throughout the state.
"We're on our way to making that dream come true," said Marty Markowitz, the Brooklyn borough President, who is to formally announce the restoration in his State of the borough address Wednesday.