✔ 最佳答案
There are two problems with this sentence:
1. "Many of them" seems to refer to "The event dinner". I know. To you it sounds like you're talking about the delegates with the word "them" but your sentence structure suggests you're referring to the dinner. That's because "The event dinner" is the subject.
2. "The event dinner was particularly appreciated by the delegates" and "Many of them traveled from other countries" are two complete sentences. You cannot separate them with one comma unless if you use a conjunction like "and" or "so". The error is commonly called the "Comma Splice".
You can correct those sentences using any one of these:
The event dinner was particularly appreciated by the delegates. Many of those delegates traveled from other countries.
OR
The event dinner was particularly appreciated by the delegates, and many of those delegates traveled from other countries.
OR
The event dinner was particularly appreciated by the delegates, so many of those delegates traveled from other countries.
參考: 知少少扮代表.