bolt upright: 笔笔直直
It annoys me if a lamppost is not bolt upright.
如果灯杆不是笔直的,我就看不过去。

turn around: 转身
She could will any young man to turn around.
她凭意志力能使任何年轻男人回头看她。
You'll have to back the car up and turn around.
你得倒车，掉头走。

on purpose: 故意地
Bless your heart, I know you didn't break the vase on purpose. Don't cry!
好了好了，我知道你不是故意把花瓶打破的。别哭了。
He knocked the old man down on purpose.
他故意把那个老人撞倒。