Scientists warn that climate change could push several marine species to the brink of extinction.
Ex-tinction:Ex(出)+ tinction(熄灭)→生命之火彻底熄灭,没了。
The success of the new policy hinges on public cooperation and strict enforcement.
门 (Hinge) 少了合页就开不了,事情少了关键因素就不行——“取决于”!