be attributable to (a particular factor or circumstance)
由…引起(或造成)
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he claimed his problems were down to the media .他声称自己的问题是由传媒引起的。
be the responsibility of (a particular person)
是(某人)的责任
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it's down to you to make sure the boiler receives regular servicing .确保锅炉定期维修是你的责任。