•Head start (noun) -

An advantage that someone has over other people in something such as a competition or race. （抢先起步的优势，有利的开端）

Examples:　　

1.A good education gives your child a head start in life.  

2.You've got a head start over others trying to get the job because you've got relevant work experience.

•Take the initiative (to do sth) (idiom) -

To activate oneself to do something even if one has not been asked to do it.（采取主动，带头）

Examples:　　

1.The door hinges squeak because no one will take the initiative to oil them. 

2.We must take the initiative in the struggle to end the war. 

•Seeing is believing (proverb) -

Used to say that when something unlikely is witnessed, the truth of its occurrence or existence can no longer be doubted. （眼见为凭，百闻不如一见）

Examples:　　

1.If you're still not convinced, seeing is believing. 

2.I didn't think it could happen, but seeing is believing.

•Stand out (phrasal verb) -

To be much better than other similar people or things. （脱颖而出，出众）

Examples:　　

1.We had lots of good applicants for the job, but one stood out from the rest.  

2.Three of the cars we tested stood out among the rest.

•Largesse (noun, from French) –

Willingness or generous act of giving presents or money to a large number of people.（慷慨，（花钱）大方）

Examples:　　

1.Across the globe spending is being driven by government largesse since the financial crisis. 

2.The medical foundation will be the main beneficiary of the millionaire's largesse.