1. fall in love 坠入爱河；fall out of love 爱情不再。
如，He was penniless when I fell in love with him.
The couple have fallen out of love with each other.
2. for kicks 找刺激。
The kids stole CDs just for kicks.
He enjoys doing things like rock climbing and bungee jumping, just for kicks.
3. I wasn't born yesterday. 意思是我可不傻，别想骗我。
比如，You can't expect me to believe that. I wasn't born yesterday.
You'd better come up with a better excuse. Your boss wasn't born yesterday, you know.
4. elbow room 可以伸展（发展）的空间。
The kitchen is way too small. There is no elbow room at all.
I need to find a new job. My boss doesn't give me any elbow room for professional growth.
5. one's heart is in the right place 本意是好的。
His criticism might be a bit harsh, but his heart was in the right place.
My father was really strict with me, but I knew his heart was in the right place.
6. play sth. by ear 见机行事。
I didn't have time to prepare for the job interview. I will have to play it by ear.
He is a spur-of-the-moment kind of guy. He never has plans and plays everything by ear.