Areas key to PLAN modernization include antisubmarine warfare (ASW), shipborne antiair warfare (AAW), and sustained naval operations.
解放军海军现代化的
关键环
包括反
，
艇防空作，以及连续的海上作。
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So when, in 2005, a paper in Nature reported, on the basis of the five pertinent shipborne surveys which had been made since 1957, a 30% drop in the volume of AMOC between 1992 and 2004, there was serious concern.
，2005 
，《自然》杂志
一篇论文根据自 1957 以来
行五次相关船载调查报告称， 1992 至 2004 
AMOC 数量下降了 30%， 引起了严重关注。
