求翻译：冷战结束以来，伴随中国在美国全球战略中地位的下降以及美国谋求美国领导的单极世界的全球战略，使得美国在南海问题上一改其过去奉行的“中立”立场，转而采取“积极”介入的政策。是什么意思？

Since the end of the Cold War, with the global strategy in China in the United States and the United States seeks to decrease the status of the US-led unipolar world's global strategy, making the U.S. a change in the South China Sea on its past policy of "neutral" stance and instead adopt a "positiv

Since the end of the cold war, China has been accompanied by a decline in status in the US global strategy as well as the United States seek to have the United States leading the unipolar world of global strategy to make the United States on the issue of the South China Sea change its past policy of

Since the cold war conclusion, has followed China the status drop as well as US seeks the American leader's single-pole world global strategy in the US global strategy, as soon as causes US to change its past in the South China Sea question to carry out “the neutrality” the standpoint, transfers ado

Since the end of the cold war, along with China in the United States the decline in status in the global strategy and the United States seeks United States of a unipolar world under the leadership of the global strategy, United States in the South China Sea changed its past policy of "neutral" posit

Since the end of the cold war, along with China in the United States the decline in status in the global strategy and the United States seeks United States of a unipolar world under the leadership of the global strategy, United States in the South China Sea changed its past policy of "neutral" posit