Correct or improve the translation of the following Chinese sentences.原文：二十世纪七十年代以来，国际经济形势发生了急剧的变化。译文：Since the 1970s, international economic situation has changed radically.
Correct or improve the translation of the following Chinese sentences.原文：二十世纪七十年代以来，国际经济形势发生了急剧的变化。译文：Since the 1970s, international economic situation has changed radically.
SINCE THE 1970S, RADICAL CHANGES HAVE TAKEN PLACE IN THE INTERNATIONAL ECONOMIC SITUATION.
