Their growth has been fuelled by exports as free trade has proliferated .

它们的增长受到自由贸易激增带来的出口的推动。

These have proliferated in recent years and control assets worth hundreds of billions of dollars .

近年来，这种工具大量激增，控制的资产达到数千亿美元。

After mumbai , alas , these doubts have proliferated .

在孟买袭击发生后，这些怀疑四处扩散。

Imitation retailers and restaurants aren 't new in china , but analysts and executives say they have proliferated in recent years .

山寨零售店和餐厅在中国并非新事物，但分析师和公司高管说这些山寨店近几年数量激增。

Temporary contracts have proliferated in many countries , as a way around the expense and difficulty of firing permanent workers .

许多国家对临时雇工的需求激增，它是围绕节约支出和难于雇佣长期工而产生的一种方法。