Do not know how to say that today should be the happiest day, but I was not happy.

不知道怎么说，今天应该是开心的一天，但是我一点都不开心。

youdao

I want to say how delighted I am that you're having a baby.

我想要说，你怀孕了我是多么高兴啊。

《柯林斯英汉双解大词典》

Children aren't born knowing how to say "I'm sorry"; rather, they learn over time that such statements appease parents and friends and their own consciences.

孩子并不是生来就知道如何说“对不起”；相反，随着时间的推移，他们才明白这样的表达能安抚父母、朋友和自己的良心。

youdao

Cardiologists, such as Dr.Gerard Martin, say that within the last four years, doctors have learned how to perform more complex heart surgeries using catheters."

VOA: standard.2010.01.01

so I just want to say how much I appreciate both of you and I want to also say that stay strong.

我只想说，我非常感谢你们两位,我还想说，两位要一直这样坚定。

普林斯顿公开课 - 人性课程节选

We've got to figure out somehow how it is that consciousness is never completely uninhibited, never completely does and says what it wants to say.

我们无论如何都应找出,为什么意识永远不能完全不受拘束，永远不能完全表达它想表达的东西。

耶鲁公开课 - 文学理论导论课程节选

He said he wanted to know how police are able to say that the shooting is not linked to paramilitaries.

BBC: Sean Kelly released unconditionally

Worse yet, rather than focus exclusively on such pressing problems as how to maintain -- to say nothing of how to upgrade 1-- that obsolescing arsenal, enormous laboratory resources (human and financial) are being diverted to dubious purposes.

CENTERFORSECURITYPOLICY: Lights Out at los Alamos?

Moreover, if you say that it is based on the Sunnah, I can say that how to depend on Sunnah in this regard.

CENTERFORSECURITYPOLICY: Islamonline confirms stoning basis in Shariah