Dangerous undertows make swimming unsafe along most of the coastline.由于存在着危险的下层逆流，在大部分海岸线附近游泳都不安全。The ice on that pond is unsafe for skating.在那个池塘的冰面上溜冰不安全。In the larger neighbourhood, I felt very unsafe.在大一点的小区里，我感到很不安全...
He had a chequered political career spanning nearly forty years.他的政治生涯将近40年，其间起起伏伏。Lining a corridor is a wall of photographs spanning his rugby days.走廊的一面墙上贴满了他橄榄球生涯里各个时期的照片。Harrison had a glorious career spanning more ...