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

保证他是好员工。

I can undertake that you will enjoy the play.

保证你会喜欢。

I wager that it shall be so.

保证(它)会样。

I promise all costs will be readily returned.

保证所有的费用会迅速偿还。

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

保证们将继续该项立法工作。

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

你能向保证不告诉别人吗？

I will warrant him an honest and reliable fellow.

可以保证他是一诚实可靠的人。

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

他给切保证, 修理将于明日完工。

I guarantee you'll enjoy yourself.

保证你会过得很快活。

I warrant you he is telling the truth.

向你保证他说的是真话。

Let me assure you that it was not intentional.

向你保证那不是故意的。

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

保证能很容易地从主街角上的亭里买到。

I'd sworn off alcohol.

已保证戒酒。

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

向你保证没有危险。

I'll undertake for your security.

将保证你的安全。

I promise on my honour.

以的名誉保证。

I pledge you my words.

向你保证说话算数。

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

简向保证在会上支持，可是到时候她又转而支持戴维，在背后捅了一刀。

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们带到I90，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，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.

有一天他把拉到一边，向保证每月初给四便士，如果能留心注意一只有一条腿的水手，并且在他（水手）出现的那一刻告诉他。