There has been a great effort, which will continue over the next two years, to reduce this debt...a millstone that is essential and indispensable.

我们已经并将在未来两年内继续为此而努力，这将是俱乐部史上不可缺少的里程碑式的举动。

youdao

Then a mighty angel picked up a boulder the size of a large millstone and threw it into the sea, and said: "With such violence the great city of Babylon will be thrown down, never to be found again."

有一位大力的天使举起一块石头，好像大磨石，扔在海里，说，巴比伦大城，也必这样猛力的被扔下去，不能再见了。

youdao