BBC听不懂了.

题目

BBC听不懂了.
A US soldier said guesswork and calmness helped him to survive his first ever skydiving jump when the instructor he was tethered to died from a heart attack.
翻译句子帮我解释一下when the instructor he was tethered to died from a heart attack.的语法是什么东东
我就是想弄懂第二句when the instructor he was tethered to died from a heart attack.是说的“当他的指导教练被拴着以致心脏病突发死了。”还是他差点死了...

答案

when (the instructor) he was tethered to died from a heart attack.
这个教官因为这个致命一击而停止心跳,死亡了.
括号里是强调,如果用when he was,你应该能看懂.tether这个词比较形象,心跳被限制了,那也就是死了.