The sense of humour is mysteriously bound up with national characteristics.

幽默感与民族有着神秘莫测的联系。

The United States is the product of two principal forces — the immigration of European peoples with their varied ideas, customs, and national characteristics and the impact of a new country which modified these traits.

一是具有不同思想、风俗和民族特征的欧洲各民族的移民进入，一是这个新国家在修改那些特征之后造成的影响。

And our ability to laugh at ourselves is one of our great national characteristics, just as well, you may say so, given some of the vicissitudes I have faced with frustratingly failing fountain pens this year.

善于自嘲正是我们民族的一大特点，考虑到我今年因钢笔故障而经历的一些挫败，你当然更可以这样说了。

Given the social and political environment and the national characteristics which determine the propensity to consume, the well-being of a progressive state essentially depends, for the reasons we have already explained, on the sufficiency of such inducements.

考虑到决定消费倾向的社会和政治环境以及民族特征，出于我们已经解释的原因，一个进步国家的福祉基本上取决于这种诱因的充分性。