Some teachers are far more effective than others. In fact, there are teachers throughout the country who are helping their students make extraordinary gains.

有些教师的教学效率要远高于其他老师。实际上，这个国家的一些老师正在指导学生如何取得杰出的成就。

His extraordinary gains arise from the high price which is paid for his private labour. They properly consist in the high wages of that labour.

他的非凡收益来自于为他的私人劳动付出的高昂代价。它们适当地存在于该劳动的高工资中。

To depart upon any occasion from those rules, in consequence of some flattering speculation of extraordinary gain, is almost always extremely dangerous and frequently fatal to the banking company which attempts it.

在任何情况下，由于对超常收益的某种讨人喜欢的投机而背离这些规则，几乎总是极其危险的，而且对试图这样做的银行公司来说往往是致命的。