•Red-letter day (noun) -

A special, happy, and important day, or a day that you will remember, because of something good that happened then.（喜慶日子，值得紀念的日子）

Examples:　　

1.Winning the championship was a red-letter day for our team.　　 2.It could mean the difference between a red-letter day and an empty

　　　　basket.

•Take office (idiom) -

To begin serving as an elected or appointed official.（就職，履新）

Examples:　　

1.I promise that when I take office, I'm going to dedicate my time and energy to solving this city's homelessness crisis.　　

2.All the elected officials took office just after the election.　　

•Pull together (phrasal verb) -

If people pull together, they work together or help each other in order to achieve something or deal with a difficult situation.（齊心協力，通力合作）

Examples:　　

1.We don't have much time but if we all pull together we should get the job done.　　

2.They would be far better off, materially and emotionally, if they all pulled together.

•Count on/upon (phrasal verb) -

If you count on something or count upon it, you expect it to happen and include it in your plans.（期待，指望）

Examples:　　

1. There's never a taxi when you want one - that's the one thing you can count on!

2.The government thought it could count on the support of the trades unions.

•Go through sth (phrasal verb) -

If you go through an experience or a period of time, especially an unpleasant or difficult one, you experience it. （經過，經歷）

Examples:　　

1.We can't really imagine what they've been going through.　　

2.South Africa was going through a period of irreversible change.