n.磨，磨石，粉碎器，重担
That contract proved to be a millstone around his neck.
那个合同结果成了他的一个负担。
For today's politicians, the treaty is becoming a millstone.
对于今天的政客而言，这个条约正在变成一个包袱。
His lazy son is a millstone round his neck.
他那懒散的儿子是套在他身上的一个沉重负担.
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