场景：近来爆发的猪疫情让人们忧心忡忡。
造句：Outbreaks of swine fever epidemic in the city are cause for alarm .
用法：
give cause for both hope and worry 喜忧参半
is grounds for anxiety , but not yet cause for alarm
场景：近来爆发的猪疫情让人们忧心忡忡。
造句：Outbreaks of swine fever epidemic in the city are cause for alarm .
用法：
give cause for both hope and worry 喜忧参半
is grounds for anxiety , but not yet cause for alarm
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