但是狂风暴雨来袭，空中乌云密布，能见度很低，直升飞机旅行被取消，与卡尔扎伊的会面更改为15分钟的通电话。
But a storm rolled in with high winds , dust and low cloud cover , so his helicopter trip was canceled , and the Karzai meeting became a 15-minute phone call .
空中能见度