to be at liberty to do something表示一个人可以自由地、随意地、不受约束地做某事。
- Some companies keep information about salaries confidential and lower rank managers are not at liberty to discuss them.
- This is a free country! I‘m at liberty to go wherever I like.
值得注意的是，另一个短语to take liberties with something或someone的意思是滥用做事的权力，冒昧行事。
- Don‘t take liberties with me, Mr Jones! I am a married woman and the only man allowed to kiss me is my husband.