host

/hoʊst/

a person who invites guests to a social event (such as a party in his or her own home) and who is responsible for them while they are there

中文释义：主人；东道主

The host greeted each guest with a warm smile and a handshake.

主人面带温暖的微笑，与每位客人握手致意。

As the host of the conference, she ensured everything ran smoothly.

作为会议的主办方，她确保一切顺利进行。