a traveling opera company的用法和样例：
- A travel company used as a front for bringing dangerous drugs into the country.
- I will not mind work in a travel agency.
- John quit his job and struck out on his own as a traveling salesman.
- Since Mr.Cramer is a traveling salesman, he's often difficult to run to ground.
- I found the opera company, symphony orchestras,museums, theaters, steels..