positive reinforcement and extinction 正强化和消退法
periodic firing and extinction test 周期触发和熄灭试验
radiation and extinction 辐射演化和绝灭作用
permanence and extinction 持续生存与绝灭
persistence and extinction 持续生存与绝灭
persistency and extinction 生存与绝灭
growth and extinction behavior 生长和灭绝行为
fire prevention and extinction 防灭火
change and extinction of language 语言的变化与消亡
From the standpoint of a traditional educator, this outcome indicated that schooling had failed to help students think about ecosystems and extinction, major scientific ideas.
从传统教育家的角度来看,这一结果表明,学校教育未能帮助学生思考生态系统和物种灭绝等主要科学思想。
We do know that climate change is important: if you dry and warm the butterfly's habitat it will cause increased starvation and extinction.
当栖息地变得温暖干燥时,这种蝴蝶会无处觅食,进而导致种群灭绝。
It is a natural process and extinction is the fate of any animal that has specialized too far to change when its environment changes, or has to compete with a better-adapted and more powerful animal.
这是一个自然过程,任何一种过于特化而不能随环境改变而改变的动物,或者任何一种与适应性更强、更厉害的动物来竞争的动物,灭绝都是其必然的命运。
"There are at least 27 different indigenous groups in Colombia that are considered to be at risk of extinction largely as a result of armed conflict and forced displacement.
VOA: standard.2009.03.22
And, in fact, once you teach an animal something, if you stop doing the teaching the response goes away and this is known as extinction.
事实上,条件反射形成以后,如果得不到强化,条件反应就会逐渐消失,这就是消退。
These conditions permitted a development of institutions and habits needed for freedom, even as they also made Europe vulnerable to conquests and to extinction, and Europe was almost extinguished practically before there was a Europe; very early in its history.
这些恰恰是自由的形成和发展,需要的的制度和特征,尽管这也使欧洲,在外敌入侵时变的不堪一击,实际上,在它早期的历史中,欧洲在尚未形成前就差点消失
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