catch on 变得流行，理解，明白
He invented a new game,but it never really caught on.
He is very quick to catch on to things.

catch sight of 看见
I didn't so much as catch sight of him all day long.

charge sb with 控告某人犯...罪
He was charged with murder.

chat with 与（某人）聊天
He's been on the computer all morning chatting with his friends.

check in 办理登记手续，报道
Please check in at least an hour before departure.

check on 上班，核实，核查
I'll just go and check on the children.

check out of 结账后离开，检验，核查
Guests should check out of their rooms by noon.

cheer up 使高兴，使振奋
Give Mary a call. She needs cheering up.

cling to 抓紧，紧附，坚持（某观念，信条）
After her mother's death, Sara clung to her aunt more than ever.

come off 实现，成功
They had wanted it to be a surprise but the plan didn't come off.

come out 出来，说出，出现，结果是...
The rain stopped and the sun came out.

come through 传过，穿透，达到，接通
A message is just coming through.

come up 发生，上升，发芽
We watched the sun come up.

complain of 抱怨，诉苦
She left early, complaining of a headache.

comply with 服从，遵从
They refused to comply with the UN resolution.