Concern的用法

雅虎字典對concern的解釋"(不用被動式)關於",下面卻有個例句寫著 The letter is chiefly concerned with export commodities. 我查朗文辭典解釋:[ not in passive ] if a story, book, report etc concerns someone or something, it is about them. 牛津字典解釋:~sth(also be concerned with sth)to be about sthQ:那concern當"關於"解釋時,是只能用主動還是兩者都可? 另看到知識+有人說,上句變成主動就是:The... show more 雅虎字典對concern的解釋"(不用被動式)關於",下面卻有個例句寫著 The letter is chiefly concerned with export commodities. 我查朗文辭典解釋:[ not in passive ] if a story, book, report etc concerns someone or something, it is about them.
牛津字典解釋:~sth(also be concerned with sth)to be about sthQ:那concern當"關於"解釋時,是只能用主動還是兩者都可?

另看到知識+有人說,上句變成主動就是:The letter concerns with export commodities chiefly.
Q:這樣看起來concern好像是不及物用法,concern有不及物用法嗎?
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