Push hard and fast. Aim for a rate of about one hundred compressions each minute.

VOA: special.2009.06.09

Hence, selfish genes will lead to altruistic animals because, to the extent that evolution operates at the level of the genes, there's no hard and fast distinction between your own body and someone else's body.

所以，自私基因会导致利他行为，从这个意义上说,进化在基因层面进行，你自己的身体和别人的身体,没有严格差别。

耶鲁公开课 - 心理学导论课程节选

RAM You probably know your computer has something called RAM which is where documents and programs live just temporarily while you're running them 'cause RAM tends to be pretty fast and whereas your hard disk is where programs and files live permanently.

也许你知道电脑有一个,正在使用的程序和文件都暂时存放在那里,而且会加快电脑速度,而硬盘是程序和文件,永久存储的地方。

哈佛公开课 - 计算机科学课程节选

Yet he struck hard and fast, and soon had control of the valley's main towns.

VOA: special.2009.09.17

If you squeeze the trigger of a gun really hard and really fast, it doesn't fire any faster or harder than if you just squeezed it gently.

快速有力地扣动扳机,并不比你轻扣扳机,射出的更加快速或更加有力

耶鲁公开课 - 心理学导论课程节选

Renee Smith-Valade said in addition to making it through the media sessions, she and her staff have also worked hard in making sure the Vancouver Olympics Web site has been a source of good,fast,accurate and detailed information about the Winter Games.

VOA: standard.2010.02.25