So while economic describes anything economy-related or the success of a business, economical refers to avoiding waste.

也就是，economic（经济的，有利可图的）是被用来形容跟经济方面的或者成功的生意的一个词。而economical（节俭的，算的）指的是不要浪费。

Despite North Korea's record of caprice and outright deceit, this is a good deal for America.

尽管朝鲜曾有反复无常和彻底欺骗的记录，这对美国来是一项算的易。

But using such plastic as a replacement for bitumen is cost-effective, claims Mr McCartney.

但是使用这种塑料作为沥青的替代品是很算的，麦卡。

Mr Mlodinow notes that economic models, for instance, are built “on the assumption that people make decisions… by consciously weighing the relevant factors”, whereas the psychological research suggests that, most of the time, they do no such thing.

例如，蒙洛迪诺指出，经济算的模式建立在“们自觉地衡量相关因素再决定......这一假设之上”，而心理学研究表明，大多时侯他们不做这样的事。

He said he thought it would be a good arrangement for the Zoo, because any time they wanted a young Trumpeter Swan, Louis would give them one of his cygnets.

他他认为对动物园来这是个非常算的安排，因为他们无论何时想要一只小号手天鹅，路易斯都会把他的小天鹅送给他们一只的。

And I think possibly pulling out of markets where the economics just don't make sense could be one of those results.

我认为，退出那些经济上不算的市场，可能是结果之一。

You negotiated what you thought was a good deal.

你通过协商得到了你以为是算的易。