The officiator welcomed everyone to the ceremony.

主持人欢迎所有人参加仪式。

The officiator ensured that the event ran smoothly.

主持人确保活动顺利进行。

The officiator announced the start of the competition.

主持人宣布比赛开始。

The officiator thanked everyone for their participation.

主持人感谢所有人的参与。

The officiator introduced the guest speaker to the audience.

主持人向观众介绍了特邀演讲者。