Keynote address/speech (phrase)

●The main speech at a meeting or formal event, which is given by the keynote speaker.

　　（主題演講，主旨報告）

Examples:　　

1.She'll be delivering the keynote address at the conference on Friday.

2.The keynote speech will be an opportunity for the president to outline his agenda for the next 12 months.

On a par with (idiom)

●Of the same quality as or at the same level as.

　　（與…不相上下，與…一個水平）

Examples:　　

1.Profits should be on a par with last year.　　

2.This violinist may be an amateur but he's on a par with professional orchestral players.

Backdrop (noun)

●The backdrop to an event is the general situation in which it happens.（背景）

Examples:　　

1.The election will take place against a backdrop of increasing instability.　　

2.Their love affair began against a backdrop of war.

Sum (sth) up (phrasal verb)

●To give a summary of something.

Examples:　　

1.I would like to sum this lecture up by listing the main points I have covered.　　

2.She summed up the president's speech in three sentences.

Go down into history (idiom)

●To be recorded for history as a significant person or event.（載入史冊，名留青史）

Examples:　　

1.If this team win the league they will go down in history.　　

2.He'll go down in history as one of our finest leaders.