大学英语：at a later time

Go ahead with your work， I will give you a call at a later time.

　　I am not sure if I can remember all this at a later time.

　　2. in contrast (with / to)

　　Helen is very talkative. In contrast， her elder sister is silent.

　　His rudeness was in striking contrast with Jack's thoughtfulness.

　　3. look up

　　I don't remember Tom's telephone number， will you please look it up in the telephone book for me?

　　Look up the dictionary for the meaning of this new word.

　　4. be unable to

　　I am really sorry that I was unable to give you a call beforehand.

　　He was unable to provide us with more information.

　　5. be released from

　　He was released from prison after he had been kept there for 5 years.

　　He was released from a hospital last week after treatment for a disease.

　　6. be rewarded with

　　The winner was rewarded with gift of fruit and flowers.

　　If the rat could find the right door， it would be rewarded with food.