AC - excitation的用法和样例：
- AC excitation is a good solution to this problem.
- Perhaps his nerve is naturally too dull to admit of any excitation.
- That footballer has been transferred to AC Milan.
- The discussion includes the benefits and shortcomings of ac and dc excitation techniques using current and voltage.
- AC excitation is a powerful approach to separating these errors from the signal.
- The angle is contained by the lines AB and AC .