,which would otherwise run the risk of becoming extinct.
问题描述：
,which would otherwise run the risk of becoming extinct.
.These national parks are very important for preserving many animals,who would _otherwise______ run the risk of becoming extinct
后半句翻译一下
答
这些国家公园对于保护许多动物是非常重要的,这些动物会（would）___否则___冒灭绝（extinct）的风险.
run the risk of..冒什么什么的风险