Jeans are not appropriate for a formal party.

正式聚会上穿牛仔裤不合适。

《牛津词典》

A formal contract is signed which is renewable annually.

签署的一份正式合同每年可续签一次。

《柯林斯英汉双解大词典》

Steve didn't have the benefit of a formal college education.

史蒂夫没有接受过正规大学教育的优势。

《柯林斯英汉双解大词典》

Afterwards, they held a formal meeting to discuss what to do with the baby.

VOA: special.2009.06.06

For the carbon, we start with 4 valence electrons, we have 0 lone pair electrons minus 4, and we end up with a formal charge of 0.

对于碳，我们从四个价电子开始，我们有零个孤对电子，再减去四，最终我们有零个形式电荷。

麻省理工公开课 - 化学原理课程节选

So for example, that might have a formal charge of negative 1, because to some extent it has gained that much electron density that it now has a formal charge that's negative.

比如，可能它的形式电荷为负一，因为在一定程度上它得到了这么多的共用电子密度,那么它现在就有了负的形式电荷。

麻省理工公开课 - 化学原理课程节选

Under French law the court's decision falls short of a formal charge, our correspondent says.

BBC: Nicolas Sarkozy to be investigated in Bettencourt scandal

He promised that the allegations would be investigated by them if a formal complaint was received.

BBC: Gibraltarians attack 'filthy' NHS hospital

United Daily News says Taipei must not be "half-hearted" on demanding a formal apology and compensation.

BBC: China media: Philippines row