The fertility fall is releasing wave upon wave of demographic change.
生育率下降在人口结构变化中兴起了层层波澜。
People of the world, be courageous, dare to fight, defy difficulties and advance wave upon wave.
全世界人民要有勇气，敢于战斗，不怕困难，前赴后继。
Wave upon wave of negative economic reports keep pushing the world markets down.
一波又一波的经济坏消息接踵而来，促使全球股市大幅走低。
Wave upon wave of Chinese visitors, in small groups and coach parties, alone and in pairs, pack the pavements and malls.
一拨又一拨的中国游客，三五成群或跟着旅行团，独自一人或成双成对，在人行道和商店里汇聚着。
Wave upon wave of Chinese visitors, in small groups and coach parties, alone and in pairs, pack the pavements and malls.
一拨又一拨的中国游客，三五成群或跟着旅行团，独自一人或成双成对，在人行道和商店里汇聚着。
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