MOSCOW/KIEV, July 17 (Xinhua) -- Russia on Tuesday rejected U.S. President Donald Trump's 50-day ultimatum to agree to a Ukraine ceasefire, dismissing the threat of "severe tariffs" as unacceptable.

WASHINGTON, July 16 (Xinhua) -- U.S. President Donald Trump on Wednesday unveiled a plan to impose a unified tariff rate on more than 150 countries and regions, according to a report by Politico.

布鲁金斯学会（Brookings ...