名词短语中文翻译
中文翻译：莴苣的霜霉病
同义词：
['lettuce downy mildew', 'lettuce mildew']
例句：
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1.The lettuce was severely affected by the downy mildew.
莴苣严重受到了霜霉病的影响。
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2. The farmers are trying to control the downy mildew on their crops.
农民们正试图控制他们作物上的霜霉病。
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3. The downy mildew is a common problem in the greenhouse.
霜霉病是温室中常见的问题。