Mention 2-3 people who have helped to turn the event from an idea into reality. State their names and the role that each person played.  An example of acknowledging individual people is saying, “We couldn’t have pulled off this fundraiser without the hard work and dedication of Grace and Sally, who worked tirelessly from day 1 to make today a reality.” Avoid reading off a long list of people or sponsors, as your audience will begin to get bored. Stick to just a handful of highlights. Point out what's coming up later on in the event or over the next few days, if applicable. Pick the parts that are the most important, and give people encouragement about anything they should stick around for or pay special attention to.  For instance, at a conference, you might point out when the dinner will be held, or where particular sessions will take place. At a wedding reception, you might note when dancing will start or when the cake will be served. Welcome the guests again, but this time in a way that relates to the overview that you just mentioned. For example at an informal gathering you could say, "I'm excited to get to know all of the new faces here during our legendary cricket game!" For a more formal event, wish everyone a smooth transition for the next part of the event. Alternatively, you could end the body of your speech during an informal gathering by saying, “I can't wait to see you all out on the dancefloor!”

How would you rephrase that briefly using Chinese?
向那些在活动中起着重要作用的人致谢。 要涵盖活动中的每一个重要部分。 再次表示欢迎。