This dependency between fossil and living types is well illustrated when we deal with extinct groups . 化石与现存类型之间的这种依赖关系在我们研究绝灭类群时是十分明显的。
In an extinct volcano, such as he boasted that his breast was, it was wonderful how he should feel such a flame ! 他时常夸口，说他的心已成了一座死火山，可是奇怪，这颗心怎么会喷出了烈火呢！
One could easily believe that in that dead landscape the germs of life and fruitfulness were extinct forever . 人们很容易地相信，在这样一幅死一般的风景画中，生命的繁殖和果树的萌芽皆已绝种灭迹。
Similarly, high heat flows are to be expected among the active or not-too-long extinct magmatic belts of plate approximation zones . 同样，在板块相互靠近的地带的活动岩浆带或熄灭不久的岩浆带中也可以出现高热流。
The little light in the lodge had long been extinct 门房里的那盏小灯早已熄灭了。
So ， the electric tubes were predicted to extinct 所以，电子管被认为将绝迹。
