4 见 https://news.cgtn.com/news/2020-10-13/World-GDP-to-drop-4-4-in-2020-IMF--UyNuoUIFlC/index.html; 和 Organisation for Economic Co-operation and Development, “Unprecedented falls inGDP in most G20 economies in second quarter of 2020”, news release, 14 September 2020。
4 See https://news.cgtn.com/news/2020-10-13/World-GDP-to-drop-4-4-in-2020-IMF-- UyNuoUIFlC/index.html; and Organisation for Economic Co-operation and Development, “Unprecedented falls in GDP in most G20 economies in second quarter of 2020”, news release, 14 September 2020.