报道：为推动伊朗重返核谈判，美国考虑放松对伊制裁，并助其获得一项高达300亿美元投资

Core Points - The article discusses secret diplomatic efforts by the Trump administration to restart nuclear negotiations with Iran, including potential measures to ease sanctions and provide financial support for Iran's civilian nuclear program [1] Group 1 - The Trump administration is considering multiple measures to encourage Iran to return to the negotiation table, such as easing sanctions and facilitating up to $30 billion in investments for Iran's civilian nuclear program [1] - There are proposals on the table regarding these plans, but they are still in the preliminary stages and subject to change [1] - The U.S. maintains a consistent demand for "zero uranium enrichment" from Iran as part of the negotiations [1]