U.S.officials say they are in a better position to mediate and press for the resolution of difficult issues, and to ease tensions between the Iraqi Army and the Kurdish Peshmerga militia, while the United States has a sizable military force in Iraq.

VOA: standard.2009.12.11

Okay, so you guys have identified some of the key issues that make dietary assessment so difficult.

好的,大家指出了一些使饮食评估,变得很难的关键因素

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The issues must be treated carefully, or they will be difficult and painful if an elected official has to deal with them.

VOA: special.2009.12.06

National issues presented President Pierce with more difficult decisions.

VOA: special.2009.04.23