Question

formal 【FORMAL】You must write a formal acceptance to this invitation. 你必须写个正式的收条回复这次邀请。【重点词汇】formal adj. 正式的

Accepted Answer

['fɔːrml] 
formalbeing in accord with established forms and conventions and requirements (as e.g. of formal dress)
Being formal is all about being taken seriously. If you're invited to the White House, you want to make a good impression, so it's a good idea to adopt a generally formal demeanor. No jeans or trash talking allowed.
In our casual world, there are still many times we need to be formal, like at weddings or funerals.  Adopting a formal manner — i.e., dressing up and not eating with your hands — will help you make a good impression on job interviewers or future in-laws. Being formal doesn't have to mean being stiff or unnatural; it's basically just using good manners and following the rules.
All forms of 'formal' will appear on average once every 133 pages.formalformaliseformalismformalityformalizeformallyformalnessinformalsemi-formalsemiformalformalisationformalisedformalisticformalitiesformalizationformalizedinformalityinformally

Front	formal
Pron	['fɔːrml]
Back	【FORMAL】 You must write a formal acceptance to this invitation. 你必须写个正式的收条回复这次邀请。【重点词汇】 formal adj. 正式的
Vocab	formalbeing in accord with established forms and conventions and requirements (as e.g. of formal dress) Being formal is all about being taken seriously. If you're invited to the White House, you want to make a good impression, so it's a good idea to adopt a generally formal demeanor. No jeans or trash talking allowed. In our casual world, there are still many times we need to be formal, like at weddings or funerals. Adopting a formal manner — i.e., dressing up and not eating with your hands — will help you make a good impression on job interviewers or future in-laws. Being formal doesn't have to mean being stiff or unnatural; it's basically just using good manners and following the rules. All forms of 'formal' will appear on average once every 133 pages. formal formalise formalism formality formalize formally formalness informal semi-formal semiformal formalisation formalised formalistic formalities formalization formalized informality informally

Formal Good Forms Make Fɔːrml Write Acceptance Invitation