unofficially
adverb/ˌʌnəˈfɪʃəli/
/ˌʌnəˈfɪʃəli/
- without having permission or approval from somebody in authority
未经正式批准的；非官方的；非正式的 - Costs were unofficially estimated at about $6 000.
非官方估计成本约为 6000 美元。 - He had already been doing the job unofficially, and now he would be paid for it.
他已经在非正式地从事这项工作，现在他将获得报酬。
- Costs were unofficially estimated at about $6 000.
- without being part of somebody's official business
非公事的；私事的；私人的 - US officials have visited the country unofficially in the past.
美国官员过去曾非正式访问过该国。
opposite officially - US officials have visited the country unofficially in the past.