Can I have your assurance that this will go no further?

你能向我保证不告诉别人吗？

He gave me a definite assurance that the repairs would be finished tomorrow.

他给我确切保证, 修理将于明。

Let me assure you that it was not intentional.

我向你保证那不是故意。

I can vouch for the fact that he is a good worker.

我保证他是好员。

I promise all costs will be readily returned.

我保证所有费用会迅速偿还。

I can undertake that you will enjoy the play.

我保证你会喜欢这个剧。

I give an undertaking that we shall proceed with the legislation.

我保证我们将继续该项立法。

I wager that it shall be so.

我保证(它)会这样。

I will warrant him an honest and reliable fellow.

我可以保证他是一个诚实可靠人。

I warrant you he is telling the truth.

我向你保证他说是真话。

I assure you (that)there's no danger.

我向你保证没有危险。

I'm sure I can easily get the book from the bookstand in the corner of the main street.

我保证我能很容易地从主街角亭里买到这本。

I pledge you my words.

我向你保证说话算数。

I guarantee you'll enjoy yourself.

我保证你会过得很快活。

I'd sworn off alcohol.

我已保证戒酒。

I'll undertake for your security.

我将保证你安全。

I promise on my honour.

我以我名誉保证。

Jane promised to support me at the meeting, but then she stabbed me in the back by supporting David instead.

简向我保证在会支持我，可是到时候她又转而支持戴维，在我背后捅了一刀。

Spearfish Canyon Rd took us to I90, which we took into Wyoming and on to Sundance (not the Robert Redford film festival burg, I assure you).

斯皮尔菲什峡谷路把我们带到I90，我们考虑到怀俄明州，并就森丹斯（而不是罗伯特雷德福电影节伯格，我向你保证）。

One day,he took me aside and promised me a sliver fourpenny on the first of every month if I would keep my eye open for a sailor with one leg and let him know the moment he appeared.

有一天他把我拉到一边，向我保证每月初给我四便士，如果我能留心注意一个只有一条腿水手，并且在他（水手）出现那一刻告诉他。