Ponder on sth (phrasal verb)

●To think carefully on something.（思考，考慮）

Examples:　　

1.I need to ponder on this.　　

2.The Prime Minister pondered on when to go to the polls.

Generality (noun)

●The quality or state of being general rather than specific or detailed（一般性，概括，空泛）

Examples:　　

1.We need to get away from generalities and focus on the issues.

2.Politicians speak in generalities -- they want to cut the deficit and keep taxes low, etc., but they don't want to tell you exactly how they will do that.

Not to mention (idiom)

●Used when you want to emphasize something that you are adding to a list.

（更何況…，更不必說…，而且還…）

Examples:　　

1.He's one of the kindest and most intelligent, not to mention handsome, men I know.　　

2.We were served a sumptuous entree, not to mention the other courses.

Impact on sb/sth (phrasal verb)

●To have an effect on someone or something.

（影響，衝擊）

Examples:　　

1.High interest rates have impacted on retail spending.　　

2.This plant closing will impact upon the local economy for years to come.

Be prone to sth/do sth (idiom)

●Likely to [do] something; apt to have something.

（易於，傾向於）

Examples:　　

1.We are creatures prone to go to extremes: like the pendulum of a clock in motion, we swing from one side to the other.　　

2.He is rather prone to making tactless remarks.