mill,磨坊，stone,石头。

1. That contract proved to be a millstone around his neck.

那个合同结果成了他的一个负担。

2. 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。

3. 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.

4. That mortgage has been like a millstone round my neck.

那笔抵押借款像是套在我脖子上的沉重负担.

5. His son is a millstone around [ about ] his neck.

他的儿子是他的重担((犹如系于他脖子上的 石磨 般沉重)).