party to an instrument

例句：

1. 1. The party was a great success.
   这次聚会非常成功。
2. 2. They all gathered at the park for the picnic.
   他们都聚集在公园里野餐。
3. 3. I'll celebrate my birthday with my friends tonight.
   今晚我将和朋友们一起庆祝我的生日。