I hope he agrees to do it. Anyway, a voice change will do him a world of good.

我希望他会同意。况且改变声音对他大有好处。

It, do the children a world of good.

它，给孩子们一个美好的世界。

It'd do the children a world of good.

对孩子们有好处。

Advice, which speaking from personal experience, can do a grieving soul a world of good.

来自个人经验的建议可以使悲伤的灵魂成为一个美好的世界。

A bit of fresh air and exercise will do her a world of good.

【world】吸点新鲜空气和适当锻炼会对她大有好处。

" I am still in quarantine but will be released today. I am feeling great and the two day's rest has done me a world of good"

“我还在隔离中，不过今天就出来了。我感觉良好，这两天的休息对我很有帮助。”

Our next-door neighbor comes out in the back garden every now and then and says it's doing the country a world of good—not his coming out into the back garden, but the weather.

我们的隔壁邻居时不时地从后花园出来，说这对这个国家有好处——不是他到后花园来，而是天气。

Something had come over the boy; it looked perhaps as if a certain unhappy love affair or something of the sort, a touch of never-to-be-forgotten sorrow and distress, had done him a world of good.

男孩身上有什么东西；看起来好像是某种不幸的恋情或类似的事情，一种永远无法忘记的悲伤和痛苦，给了他一个美好的世界。

Among these, accordingly, much discoursing with spirits went on—and it did a world of good which never became manifest. But, the comfort was, that all the company at the grand hotel of Monseigneur were perfectly dressed.

因此，在这些人中，许多与灵魂的讨论仍在继续——它做了一个从未显现出来的善事。但是，令人欣慰的是，Monseigneur大酒店的所有公司都穿着整齐。