1. 出席；到场
    Someone's presence in a place is the fact that they are there.

    e.g. They argued that his presence in the village could only stir up trouble...
           他们认为他在村里出现只会招惹麻烦。
    e.g. Her Majesty later honoured the Headmaster with her presence at lunch.
           随后女王陛下出席了午餐，令校长感到荣幸。

2. 风度；风采；仪态
    If you say that someone has presence, you mean that they impress people by their appearance and manner.

    e.g. They do not seem to have the vast, authoritative presence of those great men...
           他们看起来并没有那些伟人的翩翩风度和威严。
    e.g. Hendrix's stage presence appealed to thousands of teenage rebels.
           亨德里克斯在台上的风采吸引了成千上万的叛逆少年。

3. 鬼怪；幽灵
    A presence is a person or creature that you cannot see, but that you are aware of.

    e.g. The forest was dark and silent, haunted by shadows and unseen presences...
           这个森林黑暗寂静，经常有幽灵和看不见的鬼怪出没。
    e.g. She started to be affected by the ghostly presence she could feel in the house.
           她觉得这座房子里有可怕的鬼怪，开始变得神经紧张。

4. （军队的）驻扎，进驻，存在
    If a country has a military presence in another country, it has some of its armed forces there.

presence的反义词

    e.g. The Philippine government wants the US to maintain a military presence in Southeast Asia.
           菲律宾政府希望美国继续在东南亚驻军。

5. 存在；被包含
    If you refer to the presence of a substance in another thing, you mean that it is in that thing.

    e.g. The somewhat acid flavour is caused by the presence of lactic acid.
           这种微酸的味道是因为含有乳酸造成的。
    e.g. ...the presence of a carcinogen in the water...
           水中含有的一种致癌物质

6. 引起注意；使得到关注
    If you make your presence felt, you do something which makes people notice you or pay attention to you.

    e.g. Rather than politely lobbying politicians, Gay Dignity will be making its presence felt through demonstrations.
           “同性恋尊严”游行活动不会彬彬有礼地向政客们游说，而会通过示威引起关注。

7. 当着…的面；在…面前
    If you are in someone's presence, you are in the same place as that person, and are close enough to them to be seen or heard.

    e.g. The talks took place in the presence of a diplomatic observer.
           会谈是在一位外交观察员在场的情况下进行的。

8. 镇定自若；沉着冷静
    If you say that someone had the presence of mind to do something, you approve of them because they were able to think and act calmly in a difficult situation.

    e.g. He had the presence of mind to put his emergency oxygen tube in his mouth.
           他镇定自若地把应急输氧管放进了自己的嘴里。