在场用英语怎么说？

在场

例句

• You can get some exercise by knocking a ball about a field with a friend. 和一个朋友在场上打打球会使你得到锻炼的。
• I was unaware of the man’s presence. 我没有察觉到那人在场。
• There were several people standing by when the accident happened. 事故发生的时候有好几个人在场。
• The police are suspicious of his alibi because he already has a record. 警方对他不在场的辩解表示怀疑, 因为他已有前科。
• The flag is only raised when royalty is present. 只有在王室成员在场的时候才升起这面旗帜。
• She promptly seized the opportunity his absence gave her. 她立即抓住了因他不在场给她创造的机会。
• His tears were pathetic to witness. 他的眼泪引起在场人的怜悯。
• The horse is running round the field. 马在场上兜着圈子跑。
• He did not mention having been on the spot. 他没说他当时在场。
• Are you at the launch of the new ship? 新船下水时你在场吗?