Increasingly frequent disasters are causing enormous casualties and economic losses in many countries.
越来越频繁的灾难造成了各国巨大的人员伤亡和经济损失。
Virus diseases are causing serious losses in pears in north China.
据报道梨病毒病对我国北方梨造成了严重损失。
Virus diseases are causing serious losses in pears in north China.
据报道梨病毒病对我国北方梨造成了严重损失。
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