虽然对国家电网的要求变化迅速，但自从一个多世纪前电网问世后，其本身几乎没有改变。
Even though the demands being placed on national electricity grids are changing rapidly, the grids themselves have changed very little since they were first developed more than a century ago.
这些潜在的变化令人们担心菲律宾与其前殖民者一个多世纪以来爱恨交加的关系再次进入困难时期。
These potential changes to make people worry about the Philippines and its former colonists for more than a century love-hate relationship again into the difficult times.
没有哪个历史阶段像过去的一个世纪这样有如此多的重大变化。
No period in history has had as many important changes _______ have taken place in the past century.
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