动词短语
中文翻译：阻止洪水
同义词：
['stamp down', 'halt', 'contain']
例句：
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1.We need to stem the flood of negativity that's been spreading around the office.
我们需要阻止办公室内蔓延的消极情绪。
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2.The government has been trying to stem the flood of illegal immigrants from entering the country.
政府一直在努力阻止非法移民进入该国。
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3.The floodwaters were so strong that they could not be stemmed.
洪水太猛烈了，无法被阻止。