经济体用英文怎么说

economy
楼上说的是复数形式
例子
（1）Undoubtedly, China will grow to become one of the world's greatest economies.
中国毫无疑问的将成为世界大经济体之一。
（2）Kenya has the largest economy in East Africa.
肯尼亚是东非最大的经济体。
（3）However, as more and more Asian economies opened themselves to the outside world, competition has become very tough.
不过，随着越来越多亚洲经济体对世界开放，竞争已经加剧。
（4）Leaders from 21 economies in Asia-Pacific region attended the summit.
来自亚太地区21个经济体的领导人参加了会议。