There aren't so many participants in the meeting every time.
「この会議の参加者は、毎回あまり多くない」はこのように言えます:
There aren't so many participants in the meeting every time.
there aren't so many = あまり多くない
participant(s) = 参加者
meeting = 会議
every time = 毎回
There are never many people who participate in this conference.
会議 conference/meeting
参加者 participants/people who participate
毎回 (否定的な場合) never
あまり多くない not many
例文 Recently, there are never many people at the cinemas every time I watch a movie.
「最近映画を見る時に、映画館で人が毎回あまり多くない。」
ご参考になれば幸いです。