river navigation是什么意思 river navigation怎么读
river navigation的用法和样例
- America and Germany do well in inland river navigation.
美国和德国是内河航运强国。 - Inland river navigation is an important component of comprehensive transportation system.It has no commutable advantages and actions in transporting bulk cargo.
内河航运是我国综合运输体系中的重要组成部分，在大宗货物运输中具有不可替代的优势和作用。
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