同时，区位禀赋约束、国家和地方对金融的控制以及西部农业的弱质性则构成了西部农村金融制度变迁的制约因素。
At the same time, regional endowment restraint, government control on finance and the fragility of west agriculture make up the restrictive factors on change of the west rural financial system.
沽出期权则给予权力，而非强制约束，持有人以固订价格卖出股票。
B put gives the holder the right, but not the obligation, to tender a share and receive, in return, a fixed price.
构造裂缝的发育受岩石本身的力学性质以及局部构造制约，区域裂缝则与区域应力场强度有关。
The growth of structural fracture is controlled by such factors as lithology, porosity, lamellation and local structures, and the regional fracture controlled mainly by the regional stress field.
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