1. content with 满足于
（1）Don't rest content with past achievements.
（2）Be not content with the commonplace in character.
2. contrary to 违反
（1）My sister's taste in dresses is contrary to my own.
（2）Contrary to our expectations, he was eliminated in the first round.
3. cost someone an arm and a leg 代价很大
（1）That new car must have cost him an arm and a leg.
（2）Her pearl necklace cost me an arm and a leg.
4. count down 倒数到零或规定的时间
（1）The people at control have already begun to count down.
（2）This program is use to count down from a number to 1.
5. count one's chickens before they are hatched 过于乐观
--I'm sure to win the prize. I'm going to buy a new car with the money.
--Don't count your chickens before they are hatched .