人都到齐了， 一个也不缺。

No one is absent. Everybody's here.

《新英汉大辞典》

如果人都到齐了，现在我们可以开始开会。

If everyone has arrived, we may now commence the meeting.

youdao

在会议开始时，如果大家都到齐了，你可以介绍一下与会者。但是，如果只有大部分人到场，这样可能会1浪费很多的时间2人们容易疲倦。

When you have everyone in the room at the beginning you can possibly do introductions but with a large group that tends to a take a lot of time, and b people get bored.

youdao