Subject + 主持 + Event/Program
主持 (zhǔchí) means "to host," "to preside over," or "to chair" and is used for events, programs, meetings, or ceremonies. It describes the role of leading or facilitating an activity. For example, 她主持了这个节目 means "She hosted this program."
今晚的晚会由她来主持。
Jīnwǎn de wǎnhuì yóu tā lái zhǔchí.
Tonight's gala will be hosted by her.
他主持了一场关于环保的讨论会。
Tā zhǔchí le yī chǎng guānyú huánbǎo de tǎolùnhuì.
He hosted a discussion on environmental protection.
这位记者经常主持大型活动。
Zhè wèi jìzhě jīngcháng zhǔchí dàxíng huódòng.
This journalist often hosts large-scale events.