这激起了关于美国是否有能力通过更高层次的亚太地区承诺（美国在该地区已有320 000驻军）支持这一战略“重心”的能力的质疑。
This has spurred doubts about America’s ability to provide strategic heft to its “pivot” by sustaining a higher level of commitment in the Asia-Pacific region, where it already maintains 320,000 troops.