美中貿易戰宣告了兩國在國際政治的競爭局勢正式展開，2019年後的疫情更形加劇了兩國彼此的競爭關係。然而，美中對立下新冷戰的政治兩極化一定會造成國際貿易關係的兩極化嗎？世界各國真的會各自歸隊，在美國與中國之間擇一而處，形成兩極對立的局勢嗎？還是口頭上與行為上有差異，仍然依照國家自身的利益分別和美國和中國進行實質上的往來。本文即探討這個問題，比較疫情前後，國際貿易局勢的變化到底是趨向兩極化還是非兩極化。本文認為，新冷戰的局勢下，美中對立造成的政治兩極化無法避免，但政治兩極化不等於貿易關係兩極..

The U.S.-China trade war indicates a confrontation between the U.S. and China, and the pandemic problem since 2019 deteriorates the confrontation. However, will political polarization due to the new cold war between the U.S. and China lead to economic polarization? Do countries in the whole world choose their own sides between the U.S. and China, establishing two blocs and competing? Or countries in the whole world behave inconsistently in terms of verbal promises and practical actions. National interest is still their benchmark to have sub..

在解放軍發展反介入/區域拒止戰力的背景下，美國近期出現了「海空戰」作戰概念的倡議。此一作戰概念的內容堪稱完整而全面，也提出許多值得美軍採納的建議，但缺失也同樣明顯。其概念中的兩個作戰構想，深入中國大陸上空的空襲，與侵入第一島鏈之內的反潛作戰，都是執行困難且徒勞無功，更帶來沒有必要的升高風險，因而得不償失。其實，美國及其區域盟邦只要發展類似的反介入/區域拒止戰力，即可對解放軍可能的侵略與強制構成強大的抵抗力。  

People’s Liberation Army is developing its anti-access/area-denial capabilities to offset U.S. military presence in the West Pacific. In response, the operational concept of the “AirSea Battle” is currently being put forward in the United States. However, useful recommendations notwithstanding, both of its two core ideas - deep strike over Chinese mainland and anti- submarine warfare within first island chain - are difficult, futile, and contenting unnecessary risks of escalation. In fact, the United States ..