航运市场分为两类：班轮运输和不定期船运输。
There are two types of shipping markets: the linker market and the tramp market.
不定期船费率随航运市场的供求关系而波动。在市场繁荣时期，不定期船费率上升，在市场萧条时期，费率下降。
Tramp rates fluctuate with market conditions of supply and demand. In a boom period, the tramp rates rise; in a period of recession, they decline.
第二部分从国际航运的核心业务展开，航运活动主要以不定期租船运输和定期班轮运输两种完全不同的方式开展。
The second part emphasizes the core shipping business which is explored in two completely different ways: tramp shipping and liner shipping.
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