“在场”常见的英文表达有 present、on the scene 或 in attendance，具体使用哪个取决于语境：
1、 present：
含义：表示“出席的；在场的”。
例句：
How many people were present at the meeting?（有多少人出席了会议？）
All the members of the family were present at the wedding.（所有家庭成员都出席了婚礼。）
2、 on the scene：
含义：强调“在现场；及时赶到某地”。
例句：
The police arrived on the scene within minutes.（警察在几分钟内赶到了现场。）
Firefighters were quickly on the scene to tackle the blaze.（消防员迅速赶到现场扑灭大火。）
3、 in attendance：
含义：较为正式，表示“出席；在场”，常用于描述正式场合的出席情况。
例句：
There were over 200 people in attendance at the conference.（有200多人出席了会议。）
The royal family was in attendance at the opening ceremony.（王室成员出席了开幕式。）