Today's trend is toward less formal clothing.

眼下时尚趋向于穿着随便。

《新英汉大辞典》

Others have made less formal vows.

其他州长并未作出正式承诺。

youdao

Other times a less formal tone is more useful.

正规格式有时是有用的，而有些时候不太正规同样有用。

youdao

She says her students over the past several years have increasingly used less formal English in their writing.

VOA: special.2010.01.28

The "is it okay" question pattern is something that you can use to make your speech a little less formal.

is it okay”问句能够让你说的话不过于正式。

Is it okay 课堂 - SpeakingMax英语口语达人

But we could, for example, look at a case where we have several different structures that look pretty good, and the one we want to determine as being the lowest energy structure is the one in which the absolute values of the formal charges are going to be lower, so essentially that they have less charge separation.

但是我们可能，比如，遇到一种情况,有好几个候选的路易斯结构看起来都挺好的，这时候我们就需要,通过比较哪个形式电荷的绝对值更低,来决定哪个结构的能量更低，本质上这个结构中分开的电荷更少。

麻省理工公开课 - 化学原理课程节选

Loans to their grandchildren can serve as a less formal alternative to co-signing bank notes.

WSJ: Are You Coddling Your Grandkids?

Organizations that do this well have a management hierarchy plus a less formal employee innovation network.

FORBES: The Secret Formula for Corporate Strategy Execution: Part 2

But these establishment salutes were accompanied by many less formal goodbyes from feminist groups.

ECONOMIST: Roma Mitchell