船舶数量预计不但不会增长，反而会下降。
The fleet is not expected to grow and is expected to shrink.
有限的航行海域中所承载的船舶数量越来越多，由此带来船舶营运的安全性问题。
The safety problem of ship operation has appeared because that there are too many ships in limited maritime space.
这成绩取得的同时甚至还伴随着通行船舶数量的增长，从每年13000艘船上升到14000多。
This has been done even as the number of transits has risen from 13, 000 a year to over 14, 000.
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