act on principles的用法和样例：
- Principles do not mainly influence even the principled;we talk on principle,but we act on interest.
- The legal guardian must act on behalf of the child.
- My idea is that we shall act on his suggestion.
- What experience and history teach is this-that people and government never have learnt anything from history,or acted on principles deduced from it.
- Does the drug take long to act on the pain?
- She can be trusted to act on the square.