It is a labor to task the faculties of a man — such problems of profit and loss, of interest, of tare and tret,(8) and gauging of all kinds in it, as demand a universal knowledge.

这真是一个辛苦劳役，考验着一个人能，——这些赢损失问题，问题，扣除皮重计算问题，一切都要确实数字，非得有宇宙知识不可啊。