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.
真是一个辛苦的劳役，考验着一个人的全部
，——些赢利或损失的问题，利息的问题，扣除皮重的计算问题，一切都要确实数字，非得有全宇宙的知识不可啊。
