1. The swift growth of this merchant marine diversified the northern colonial economy and made it more self-sufficient. 这艘商船的迅速发展使北方殖民地经济多样化，使其自给自足的能力更强。
2. This restriction not only contributed to Great Britain's rise as Europe's foremost shipping nation but also laid the foundations for an American shipbuilding industry and merchant marine. 这一限制不仅促成了英国作为欧洲最重要的航运国家的崛起，也为美国的造船业和商船奠定了基础。
3. His brother is in the merchant Marine. 他的兄弟是名商船船员。
4. When I graduated from the U. S. Merchant Marine Academy in 1969, my educated dad was happy. 当我1969年毕业于美国商业海事学院时，我的穷爸爸非常高兴。
5. Some graduates use a degree in this field to become engineer officers in the merchant marine. 一些毕业生凭借本专业的学位成为了商船队的轮机师。
