这个难题是：如何找到有利可图的利基市场并加以保护。
The difficult question is how to find that profitable niche and protect it.
曼利·图克和纳撒尼尔·索尔兹伯里被认为是早期的传教士。
Manly Tooker and Nathaniel Salisbury are mentioned as early preachers.
只要看看在美国、日本和西欧国家男性和女性就业率之间的差距，正如高盛集团经济学家凯文·戴利最近的一项研究(参见左手图)。
Just look at the gap between male and female employment rates in America, Japan and western Europe, as Kevin Daly, an economist at Goldman Sachs, does in a recent study (see the left-hand chart).
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