词汇：formal

adj. 正式的；拘谨的；有条理的

相关场景

Please meet my friend Tom!(Formal introduction.)

>> 见面打招呼介绍自己并谈几句

Formal greetings:

For a more formal way to greet someone, use the model “good + [time of day]”.

>> 见面打招呼介绍自己并谈几句

Greetings! (This is quite formal and rare these days, but could be used humorously among friends.)

>> 见面打招呼介绍自己并谈几句