订婚的英文：
engagement

Their engagement is the talk of the town.
他们订婚的事成了镇上谈论的话题。

Jack and amy invited many friends to their engagement party.
杰克和艾咪邀请了许多朋友参加他们的订婚晚会。

My brother and she are engaged.
我兄弟和她订婚了。

Betroth:To promise to give in marriage.
订婚:对结婚的承诺。

Congratulations on your engagement!
恭喜你订婚!

I congratulate you on(upon)your engagement
我庆贺你订婚。

I congratulate you on your engagement.
我祝贺你订婚。

I'm the intended.
我已经订婚了。

A little bird told me that you've got engaged.
我听说你订婚了。

Tom is engaged to Anne.
汤姆已与安妮订婚。

Be engaged in; be Busy in
从事于

I will engage to manage the business if you will engage to provide the capital.
如果你答应出资本，我答应经营这个事业。

We have to engage the room in advance.
我们不得不提前预订房间。

They have already engaged that table.
他们已经预订了那张桌子。

They engaged a resident tutor.
他们聘用了一名住家的家庭教师。