英语 ⇄ 俄语 +

be in a conference 强调
美国人	быть на конференции (The person is on site, but unavailable due to a conference, 'I'll be here, but I'll be in a conference today from 3-4. Next week, I'll be at a conference in Paris'. Dasharik)

be in a conference : 2 短语, 1 学科

政治

2