CONVENTION
同意吗（用于征求他人意见）/ 同意（用于赞同他人意见）
When you are discussing something, you can say 'Agreed?' to check whether the other people agree with what you have just said. You can say 'Agreed' if you agree with what someone has just said.
例句
'That means we move out today. Agreed?'—'Agreed.'
“那就意味着我们要今天搬出去，同意吗？”——“同意。”
'One thing you can never insure against is corruption among your staff.'—'Agreed.'
“永远也防不胜防的就是员工内部的贪污腐败。”——“同意。”