He says acute problems of diarrhea and cholera increasingly are popping up in areas and countries, which previously were able to control them.
他说,急性痢疾和霍乱的问题在许多原本可以控制这些疾病的地区和国家不断发生。
One of the most acute problems in the Yellow River Valley is an inadequate water supply.
黄河流域最紧要的问题之一是缺水。
Very acute problems exist among them.
他们之间存在着种种尖锐的问题。
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