摘要：I told her what I thought, but she didn't take my advice on board. (我把我的想法告诉了她，但她没有接受我的建议。)[牛津高级学者辞典]

习惯用语take something on board的含义“认真考虑和接受某事”，如

【例句1】The school refused to take any of the parents' criticisms on board. (学校拒绝接受家长的任何批评。) [朗文当代英语词典]

【例句2】I told her what I thought, but she didn't take my advice on board. (我把我的想法告诉了她，但她没有接受我的建议。)[牛津高级学者辞典]

若表达something的字符串太长，可以后置，如

【例句3】Banks need to take on board the views of their customers. (银行需要考虑客户的意见。) [剑桥高级学者辞典]

【例句4】I hope that they will take on board some of what you have said. (我希望他们能接受你说的一些话。) [柯林斯高级学者辞典]

为啥take something on board有这样的含义，笔者未能找到相关表述。

笔者觉得它或许与message board有时简写成board有关。

如果你有可补充的，请留言评论。

来源：国豪教育