当说到的英文：
at the mention of

参考例句：

A voice, soundless yet perfectly real, said, You are safe now
一个无声而又十分真切的声音说到:现在你安全了。

The earnestness of Jia Zhen's request softened her heart and she eyed Xifeng thoughtfully.
"今见贾珍苦苦的说到这步田地,心中已活了几分,却又眼看着凤姐出神"

It possesses a profound evangelical ancestry: Christ says many times: “Watch” ;(Matt. 26:41)
我们可以追溯到福音书遥远的列祖列宗:其督多次说到“要警醒”(《马太福音》26∶41)。

As for study, diligence is of the essence.
说到学习，勤奋是必不可少的。

Speak of angels, and you will hear their wings.
说到谁，谁就到。

make an oblique reference to
转弯抹角地说到..

She snapped back,"Listen to me."
她厉声说到：“听我说。”

I talked until I was hoarse.
我一直说到声音嘶哑

I’ll get back to this.
我后面还会说到这点。

When it comes to seafood, I like shrimp the best.
说到海鲜，我最喜欢虾。

mention是什么意思：
n. 提及，说起，通报表扬；提名表扬
v. 提到，说起，提名表扬，传令嘉奖

I mention it only as an aside.
我只是顺便提及。

Did the concert get a mention in the paper?
报纸上报道这次音乐会了吗?

He mentioned it of his own accord.
他自愿提到了它。

I prefer the former motivation that you mentioned.
我更倾向于你说的前一种方式。

He forbore to mention the matter again.
他克制住自己，不再提及此事。