If someone is hard-nosed, chances are he will never pay through the nose, or pay too much money, for an object or service.

VOA: special.2009.09.13

And if we do, in fact, hit it with light to get the electrons off, it will go back to the straight up in position, or if it gets knocked hard enough it does that, too.

而且如果我们这么做，事实上，用光轰击它以逐出电子，它就会在原位置沿直线返回，或者如果它被撞击的足够猛烈,也会出现上述现象。

麻省理工公开课 - 化学原理课程节选

They usually will end up working too hard, or they get too involved in their family,

他们要不就是工作狂，要不就是太顾家，

对付压力的方法 - SpeakingMax英语口语达人

And one last expression, one that means do not worry or work too hard.

VOA: special.2009.06.07

I think so. But video phone has been very hard to achieve. It's either been to be expensive, or too crowded, or can we use the internet to finally introduce video phone and this is different from video on-demand.

我也这么认为，但视频电话要成功很困难,它要么很贵，要么很拥堵，或者我们是否可以使用互联网引入视频电话,这与随需视频是不同的。

麻省理工公开课 - 媒体、教育、市场课程节选