他们在社交媒体上公布了订婚的消息。

They announced their ___engagement on social media.

我下周有太多约会安排，恐怕没时间见你。

I have too many ___engagements next week and won't have time to meet you.

我们的部队在边境交战中损失了三名士兵。

Our troops lost three soldiers in the border ___engagement.

她积极参与社区活动，赢得了大家的赞赏。

Her active ___engagements in community events earned everyone's praise.