Subduction is also taking place on the Pacific Northwest Cowst of North America,beyoung the end of t

题目

Subduction is also taking place on the Pacific Northwest Cowst of North America,beyoung the end of the San Andreas Fault.(beyoung the end of the San Andreas Fault.)这里的beyoung 后半句有点看不懂
This is where a subductaed plate is thought to have disappeared beneath the North American plate in recent geological time,leaving the volcanoes of the Cascade Range as evidence of its past existence.
（leaving the volcanoes of the Cascade Range as evidence of its past existence.）没看懂 主要是leaving

答案

"beyond the end of the San Andreas Fault"
超出圣安德烈亚斯断层的终点
leaving the volcanoes of the Cascade Range as evidence of its past existence.
遗留下喀斯喀特山脉的火山做为它曾经存在的证据.