commercial concern的用法和樣例：
例句
- BONTEMPS, a commercial firm trading in wines, expands rapidly the operations in Mainland China and Hong Kong.
好時光酒業是葡萄酒貿易公司，公司的主要市場面向中國大陸和香港。 - The national military export control authorities shall maintain the commercial confidentiality and safeguard the legitimate rights and interests of the military trading companies.
國家軍品出口主管部門應當為軍品貿易公司保守商業秘密，維護軍品貿易公司的合法權益。
