Not all the money, to put it mildly, has been used wisely.

客气地讲，并非所有的钱都花得很明智。

《柯林斯英汉双解大词典》

But not all the money, to put it mildly, has been used wisely.

但是说得委婉些，并不是所有的钱都用得很明智。

《柯林斯英汉双解大词典》

Saying that John was badly off is to put it mildly. He was indeed penniless.

说约翰境况不佳是委婉的说法，他其实已经身无分文。

youdao

To put it mildly, the group of friends I've had over the years and ran around together with, it was originally seven of us and the healthcare system in the United States has killed us all but two,".

VOA: standard.2009.06.13

North Korea, for instance, is a country with a significant "branding problem, " to put it mildly.

NPR: Consultants Develop Notion of Branding Nations

Nuclear energy is unpopular, to put it mildly, following the disaster at Fukushima Daiichi.

FORBES: French Government Fires Anne Lauvergeon

And there has been some private correspondence from colleagues that, to put it mildly, surprised me.

FORBES: Evolution and Embodied Physiology